Glad you liked it and thanks for the feedback. This is our first jam and the first game ever created so really appreciate the feedback.
It is designed to be hard but probably it would've been better to create more short levels. Specially the mushroom level is long and can be frustrating if you die towards the end. We did make last minute changes to the mushroom level to make it much easier compared to what it was initially designed but probably it would've been better to split the level to add a checkpoint in the middle instead.