So while I didn't quite finish this game due to a bug I encountered, I do have feedback.
I'll start off by saying I really liked this game - it's reminiscent of old school point n' click adventure games that I loved as a child like Monkey Island or Day of the Tentacle, and I think you've done well in your layout of levels. The movement is pretty good, and as Charlie has said, the difficulty ramps up in a very reasonable way. You guys should definitely work on this and expand it more.
However, I did have some issues that I'd like to mention should you wish to improve this. For one, I encountered a bug in the second level with the tree where I just couldn't interact with anything or move, almost as if the game froze. I managed to replicate this twice when playing, so not sure if it's an issue on my end?
Good submission overall!