Very solid puzzle platformer. A surprising number of challenges, which scale up in difficulty really well. Smooth controls, crisp visuals. I love how much personality and emotion comes across even though the characters are simple geometric shapes! Overall, charming and fun.
The absence of sound is a shame. There are collections of songs that you can use for free, and you can use a program like Bfxr to create simple nostalgic sound effects.
Only one gripe about the controls: the friction sometimes caused me to get stuck against the side of objects while attempting a jump. To eliminate friction, all you need to do is create a Physics Material 2D, set Friction to 0, and assign it to the Rigidbody2D of the player.
One last minor comment: restarting a level that opens with dialog should not re-trigger the dialog.