Awesome game, but i think the sprites need a complete overhaul. I could help with that if you're interested

Are slimes invincible?

This is a pretty cool and simple game :) The different slime mechanics are interesting and make me think you could design some cool puzzle mechanics with the blue and red ones. I notice that the collision of the blue slimes lingers after they die and can sometimes make the player take 2 damage. Also the top jump on level 2 is pretty hard to do. Great work dude!!