I could only play the first two levels, as the green cube in the second one did not work for me either. It plays nicely but sliding off does get annoying and I glitched for a few seconds to where I was stuck sliding off the back after spawning again. Personally, I would add sound to this some how - either simple music or effects from death. It's got some awesome potential. :)

The green cube stops working on the second level.

The game perspective is messed up and it's hard to tell if there even is space in some places. The controls are also very slippery and often lead to your death. It's almost as minimalist as the other game you submitted, because there isn't any detail or depth of gameplay. It's also impossible to complete, since on level 2 you can't get the cube at all. Also, it's not a platformer.

Can't complete level 2 but its fine

The end of the second level doesn't work and skipping is easier as ever.
Not a good game.