Wow. This is an awesome game. The levels are really nicely thought out. From the 15 entries I have played so far, this one was the most enjoyable to play.
The rewind feature was essential for me. Great game design.
TIP: Initially I didn't even realize that there was a restart and even a rewind feature, because I didn't read the README.md.
Introducing the controls and adding higher quality sprites would make this game even more enjoyable.
Nice Job.