Gameplay was very fun! The artstyle was simplistic but unique, and very effective at conveying what it needed to convey. I was going to comment about a bug that you spawn at a checkpoint you haven't reached, until I got to the end (beginning) and realised what was going on. I actually kind of liked how I started at the halfway point, thought "there's no way I can go up, looks a bit too challenging, the developer probably wants us to go down", but then when I reached the halfway mark again, I was confident enough to go up without any worries.
Solid gameplay, solid artstyle, would frog again!