Enemies

Soldier
Speed: Balanced
Health: Low
Defense: Low
Attack: Low
Size: Medium
Weapon: Shoots linear and single projectiles

Fighter
Speed: Balanced
Health: Medium
Attack: Medium
Size: Medium
Weapon: Shoots linear and single projectiles, or linear and double projectiles

Tank
Speed: Slow
Health: High
Attack: High
Size: Large
Weapon: Shoots missiles or tracking missiles

Sniper
Speed: Slow
Health: Low
Attack: High
Size: Small
Weapon: Fast and linear single projectiles

Bomb
Speed: Slow
Health: Low
Attack: High
Size: Medium
Weapon: Shoots projectiles that explode with some radius

Spike
Speed: Medium
Health: Medium
Attack: Low
Size: Medium
Weapon: Shoots projectiles in all directions around itself