This game was made by hand only using Vanila Javascript and HTML5 Canvas

This is the todo list I follow to build this game:

1. Setting up (HTML/CSS/JS)
2. Drawing Canvas
3. Resize Canvas
4. Dynamic scaling
5. Code Gravity 6 . Player Controls
6. Keyboard controls
7. Scrolling background
8. Endless repeating background
9. Create obstacles
10. Position and move obstacles
11. Count score
12. Measure time
13. Handle game over
14. Handle collision
15. Detect collision
16. Win/lose
17. Recharge energy
18. Special abilities
19. Time events with precision
20. Detect swipes
21. Finishing touches
22. animate creatures
23. Make it more steampunk
24. Animate player action
25. Clean up
26. Add sounds
27. Manage player resource
28. Play randomize sounds
29. Polish details
30. Dynamic font size