Still early into reviewing the Jam games but this one has the most potential to be expanded that I've played so far. So take my criticism with that in mind.
This could be a me thing, but doing these types of controls with a mouse adds a layer of frustration that takes the reward out of it, somewhat comparable to Getting Over It but with checkpoints. This could just be that my brain is grasping for a touch device to play this type of game on.
I don't think the levels should be easier, but anything you could do to make the player feel more in control would go along way to make it satisfying.
Overall I think it's great. I'm only complaining because there is potential.