Muhammad Rafi Ramadhan (Game Developer and Game Designer)
Space Invaders Evolved is a fast-paced arcade shooter where you face endless waves of alien enemies. Multiple enemy types keep you on your toes. bombers that dive in for explosive damage, and snipers that fire deadly lasers to block off sections of the arena. Power-ups drop from enemies giving temporary boosts like explosive bombs, knockback blasts, and multishot upgrades that can stack up to four shots. The longer you survive, the harder and more chaotic the battle becomes.
Core Gameplay Features
- Endless Wave System — Implemented continuous enemy spawning with progressive difficulty scaling.
- Universal Enemy Behavior System — Designed a shared behavioral framework governing all enemy types:
- Enemies descend through six vertical tiers, each representing a phase of approach toward the player.
- Tier transitions are triggered by the number of wall bounces, with each enemy type having distinct descent speeds and bounce limits.
- Upon reaching the final (sixth) tier, all enemies switch to aggressive pursuit mode, directly chasing the player and detonating on impact as a punishment mechanic for delayed elimination.
- Enemy Types & Behaviors
- Strikers: Standard enemies that swarm the player in large numbers, firing straightforward projectiles and using group-based movement patterns.
- Bombers: Slow-moving enemies that drop bombs creating area-of-effect explosions; maintain steady movement and drop rates regardless of wave speed.
- Snipers: Faster enemies that descend through tiers quicker than others, firing lasers that block off sections of the arena.
- Power-Up System — Developed instant-activation power-ups with timed effects and stackable upgrades, including:
- Explosive Bullets: Projectiles that detonate with splash damage.
- Knockback Bullets: Temporary stun and pushback effect on enemies hit.
- Multishot Upgrade: Expands firing capacity up to four simultaneous projectiles.
- Combat & Player Control — Designed responsive shooting mechanics, movement controls, and hit detection for a fluid arcade experience.
- UI and Game Flow — Created scoring, wave tracking, and game-over logic with corresponding user interface elements.
| System / Feature | Description | Time Spent |
|---|---|---|
| Gameplay Architecture | Designed and implemented the main game loop, wave progression, and difficulty scaling systems. | ~6 hours |
| Universal Enemy Behavior System | Built a shared behavioral framework controlling tier-based descent, bounce tracking, and final pursuit mechanics across all enemy types. | ~6 hours |
| Enemy AI & Behaviors | Programmed three enemy archetypes (Strikers, Bomber, Sniper) with individual movement, attack, and descent-speed parameters integrated into the universal system. | ~5 hours |
| Power-Up Mechanics | Implemented a system for instant-activation power-ups with time-based effects and stackable upgrades. | ~4 hours |
| Player Controls & Combat | Developed responsive player control, shooting, and collision systems for consistent arcade gameplay. | ~5 hours |
| UI / Game States | Implemented UI components for score tracking, wave indicators, and game-over transitions. | ~3 hours |
| Balancing & Playtesting | Tuned enemy speed, bounce count thresholds, and tier timings for balanced pacing and fair difficulty scaling. | ~4 hours |
| Audio & Visual Integration | Integrated explosion effects, laser visuals, and impact sounds to reinforce gameplay feedback. | ~4 hours |
Total Development Time: ~37 hours
|
flowchart LR
mm[Main Menu]
gp[Gameplay]
es[End Screen]
mm -- "Start Game" --> gp
gp -- "Player Death" --> es
es -- "Play Again" --> gp
---
config:
theme: neutral
look: neo
---
graph TD
%% ====== INITIALIZATION ======
subgraph "Initialization Phase"
Start([Game Start])
BootNote([Boot Sequence - Load Managers Systems and First Scene])
end
%% ====== CORE SYSTEMS ======
subgraph "Core Systems"
InputManager[Input Manager]
AudioManager[Audio Manager]
SceneLoader[Scene Loader]
UIManager[UI Manager]
SaveSystem[Save and Scoreboard System]
end
%% ====== GAMEPLAY ======
subgraph "Gameplay Logic"
GameManager[Game Manager]
PlayerController[Player Controller - Movement Shooting Health]
UpgradeSystem[Upgrade System - Power Ups and Buff Timers]
end
%% ====== ENEMY SYSTEM ======
subgraph "Enemy System"
EnemyManager[Enemy Manager - Controls Waves and Tier Behavior]
SpawnManager[Spawn Manager]
EnemyEntity[Enemy Entity - Base Enemy Logic]
end
%% ====== USER INTERFACE ======
subgraph "UI System"
MainMenu[Main Menu]
HUD[In Game HUD]
EndScreen[End Screen and Scoreboard]
end
%% ====== FLOW CONNECTIONS ======
Start --> BootNote
BootNote --> InputManager
BootNote --> AudioManager
BootNote --> SceneLoader
BootNote --> UIManager
BootNote --> SaveSystem
%% Gameplay Links
InputManager --> PlayerController
PlayerController --> GameManager
UpgradeSystem --> PlayerController
GameManager --> UIManager
GameManager --> SaveSystem
%% Enemy Links
GameManager --> EnemyManager
EnemyManager --> SpawnManager
SpawnManager --> EnemyEntity
EnemyEntity --> UpgradeSystem
EnemyManager --> GameManager
%% UI Links
UIManager --> MainMenu
UIManager --> HUD
UIManager --> EndScreen
MainMenu --> GameManager
HUD --> PlayerController
EndScreen --> MainMenu
%% ====== STYLING ======
classDef initStyle fill:#e1f5fe,stroke:#01579b,stroke-width:2px
classDef systemStyle fill:#ede7f6,stroke:#4a148c,stroke-width:2px
classDef gameplayStyle fill:#e8f5e9,stroke:#1b5e20,stroke-width:2px
classDef enemyStyle fill:#f1f8e9,stroke:#33691e,stroke-width:2px
classDef uiStyle fill:#fff3e0,stroke:#e65100,stroke-width:2px
class Start,BootNote initStyle
class InputManager,AudioManager,SceneLoader,UIManager,SaveSystem systemStyle
class GameManager,PlayerController,UpgradeSystem gameplayStyle
class EnemyManager,SpawnManager,EnemyEntity enemyStyle
class MainMenu,HUD,EndScreen uiStyle
The core gameplay of Space Invaders Evolved including player control, enemy wave progression, upgrade mechanics, and score tracking. Each module is responsible for managing specific gameplay, UI, or system-level functionality to ensure stable performance and scalability.
| 📂 Name | 🎬 Scene / Scope | 📋 Responsibility |
|---|---|---|
| GameManager | Gameplay | - Controls overall game state (active, paused, game over) - Manages game flow between gameplay and end screen - Handles timing, score updates, and wave coordination |
| AudioManager | Global | - Controls background music and sound effects - Handles mute toggles and audio settings persistence |
| MainMenu | Main Menu | - Displays title and main interface - Provides access to game start and exit options |
| EndScreen | End Scene | - Displays post-game results (score, waves survived) - Interfaces with SaveSystem to store high scores |
| HUD / UIManager | Gameplay | - Manages player HUD including score, health, and active upgrades - Displays current wave number and notifications |
| PlayerController | Gameplay | - Controls player ship movement, shooting, and health - Handles collision with enemies and projectiles |
| Projectile System | Gameplay | - Manages player bullet instantiation and movement - Optimizes object reuse using projectile pooling |
| Upgrade System | Gameplay | - Handles upgrade drops from defeated enemies - Applies instant temporary effects (e.g., Multishot, Explosive Shots, Knockback) - Manages duration and cooldown tracking |
| EnemyManager | Gameplay | - Central controller for all enemy-related logic - Integrates Wave and Tier systems for pacing and progression - Coordinates spawn timings and enemy variations |
| SpawnManager | Gameplay | - Spawns enemies at calculated positions per wave - Randomizes spawn timing and enemy type for gameplay variety |
| EnemyEntity | Gameplay | - Defines base enemy behavior (movement, attack, destruction) - Handles collision detection and triggers power-up drops upon death |
| SaveSystem | Global | - Saves and retrieves persistent data such as high scores and best wave reached |
---
config:
theme: redux
look: neo
---
flowchart TD
start["Start Gameplay"]
%% === GAMEPLAY CORE ===
start --> loop["Gameplay Loop"]
loop --> input{"Player Input"}
input -->|"Move / Shoot"| player["Player Controller"]
player --> shoot["Fire Bullets at Enemies"]
%% === ENEMY SYSTEM ===
loop --> EM["Enemy Manager"]
EM --> spawn["Spawn Wave"]
spawn --> enemy["Enemy Entity"]
enemy --> behavior["Apply Tier & Movement Behavior"]
behavior -->|"Tier 6"| chase["Chase Player and Explode"]
enemy -->|"Destroyed"| drop["Drop Power-Up"]
%% === POWER-UP SYSTEM ===
drop --> upgrade["Grant Temporary Upgrade"]
upgrade -->|"Affects Player Stats"| player
upgrade -->|"Time Expired"| revert["Revert to Normal State"]
revert --> player
%% === WAVE / SCORE LOGIC ===
enemy --> waves{"Wave Cleared?"}
waves -->|"Yes"| score["Increase Score"]
waves -->|"No"| loop
score --> nextWave["Spawn Next Wave"]
nextWave --> spawn
%% === HEALTH / GAME OVER ===
player --> hit{"Player Hit?"}
hit -->|"Yes"| hpCheck{"Health > 0?"}
hpCheck -->|"No"| endScr["End Screen: Display Scoreboard"]
hpCheck -->|"Yes"| loop
%% === LOOP BACK AFTER DEATH ===
endScr --> reset["Reset Player & Enemy States"]
reset --> loop
%%{init: {'theme':'neutral'}}%%
classDiagram
class GameManager {
+OnGameStart()
+OnGameOver()
+OnWaveCleared()
+OnScoreUpdated(score: int)
}
class PlayerController {
+OnShoot()
+OnHit()
+OnDeath()
+ApplyUpgrade(type: string, duration: float)
}
class EnemyManager {
+OnSpawnWave()
+OnEnemyDestroyed()
+OnAllEnemiesCleared()
}
class EnemyEntity {
+OnDestroyed()
+OnReachFinalTier()
+Explode()
}
class UpgradeSystem {
+OnUpgradeCollected(upgradeType: string)
+ApplyTemporaryEffect(player: PlayerController)
}
class UIManager {
+UpdateScoreUI(score: int)
+ShowEndScreen()
}
class AudioManager {
+PlaySFX(event: string)
+PlayBGM(track: string)
}
%% --- Relationships ---
GameManager --> PlayerController : starts / resets
GameManager --> EnemyManager : triggers wave spawn
GameManager --> UIManager : updates score / end screen
GameManager --> AudioManager : plays bgm/sfx
PlayerController --> GameManager : emits OnDeath / OnScoreUpdated
PlayerController --> UpgradeSystem : collects upgrades
PlayerController --> AudioManager : requests shoot / hit SFX
EnemyManager --> EnemyEntity : spawns and tracks enemies
EnemyEntity --> EnemyManager : emits OnDestroyed
EnemyEntity --> GameManager : emits OnWaveCleared
EnemyEntity --> PlayerController : deals damage on explosion
UpgradeSystem --> PlayerController : applies temporary effect
UpgradeSystem --> UIManager
UIManager --> GameManager : invokes restart / return to gameplay