Amazing game!!
Despite the controrls beeing a little bit slippy, the concepts and gameplay are challanging and enjoyable.
Just a tip: If you're planning to put some music on the next/final version, I highly recommend to check out some tracks from Hertz Devil (a chiptune artist wich I'm found of), it . It might give you some idea for the OST for the game.
Here some exemples of such:
https://www.youtube.com/watch?v=dh9szgd_Yvs
https://www.youtube.com/watch?reload=9&v=fzsTdABQRbY
https://www.youtube.com/watch?v=miu5Pvka3cQ
(These tracks really fits the challenging atmosphere of the levels when I was playing it)
I'm looking foward for future upgrades and maybe see this becoming a hit! ;)