Thanks for the kind comment! I wanted to make the levels gradually more difficult for people who are good at platformers to still have a decent challenge, the problem is mostly with WebGL making jump inputs inconsistent. I added many checkpoints near the harder jumps to make it more doable.
The level is indeed big but it's only one level. The initial idea for the game and the direction we may bring it towards in the future is a Metroidvania, we just couldn't adapt that into the jam submission for scope reasons.