I love the execution of this.
Very simplistic graphics (not a bad thing at all with the colour design)
Great audio, music was emotional and fitting while the SFX worked perfectly.
Controls were easy to understand and use
Ending was... well... beautifully done.
My only critique would be that i was confused with the instructions to start, I didn't understand that i had to hit the dark red ones to change them at first, didn't take long, but still didn't understand that at first.
This was a really solid prototype! Curious to see how this could be expanded upon!