Glow

The colors have been stolen and it's up to you to get them back by going through some challenging color-themed levels!

This hack's visuals are based on old GameBoy games, though they're not fully accurate to them. The difficulty is also pretty reminiscent of older 8-bit games, being mostly trial and error (but you have infinite lives so it's more forgiving.)

The main levels have secret exits unlocked by collecting all 4 Shattered Spheres without dying. The levels they unlock might be important for something...

To make platforming more interesting, there's wall jumps, and the player's hitbox is always small.