Overall a lovely game, fun and simple with a good amount of challenge. My only gripe with it is that it's a bit rough to control, you move so fast and the jump sometimes feels inconsistent.
Due to this I will admit I cheated a few levels by throwing a box against a wall onto my head, which forced my character into the floor. And in this state, every jump I pressed before picking up the box again would launch me further up into the air.
Still I really did like it, and visually it is quite charming. Great entry especially for the first GWJ!