Definitely has a lot of issues. You can't move while jumping unlike most platformers, it is hard to control your rolling jump (which seems to have at least two different height settings depending on your movement. That or it is just glitchy.)
The controls and hit detection are just really weird because the enemies aren't necessarily where they are visually and that makes timing much more difficult.
Managed to freeze the game by jumping up onto the next screen instead of into the ladder, which caused me to change screens and then freeze.
Lots of weird collision issues with terrain and enemies. It feels like you are more reliant on luck than skill.
There are signs all over, but it doesn't look like you can interact with them.
If you talk to the bunny with the rune, she will repeat the text about the rune if you show it to her again instead of learning the first time. This feels a bit odd.
Some parts are not clear what is solid and what isn't (especially where the fly is and on the eagle map).
The acorns respawn on returning and not sure what they even do.
That last eagle on that one map is effectively impossible to get past. It is too high to kill and it is a game of luck to try to time it.
The quit button in options quits the game, not the options menu.