2D Platformer Tutorial

I plan to make the following modifications:

• New levels (at least up to level 4) and modifications to the first two
• Possibly a complete change in theme through changed textures and UI
• A boss fight (most likely through a new enemy)
• Some new power-ups like invincibility or increased jump height
• Might add the ability to shoot projectiles at enemies, either as an innate ability or a power-up