Always a fan of puzzle games. Here's some feedback:
- clever puzzle design, easy to understand, yet hard to master
- easy to read levels and which goals have to be achieveed
- the contrast of the colors is a bit too harsh (positive sidenote: color blind friendly). here's a website to quickly find working color palettes
- missing some player feedback (like Frelude said)
All in all a solid entry to the jam and you can be proud of submitting!