Overall, I really enjoyed the game! There are a few things I'd like to highlight:
- The less fuel you have, the higher you can jump. I really like this mechanic because it encourages players to balance their resources, and keeping your fuel at maximum isn't always the best option. However, the game doesn't explain this mechanic. When I first couldn't reach a leaf that seemed too high, I initially thought the level design hadn't been thought through properly.
- The background darkening before the rain starts is a really nice little detail. It helps set the mood and signals that something is about to happen.
- I'd consider adding alternative ways for players to reduce their fuel intentionally. Even though the game is short, I found it a little frustrating to stand still and wait for the rain just to be able to jump higher. Giving players more control over this mechanic could make the gameplay feel more engaging.
For a three-day game jam, I think this is a pretty good game! My main suggestions would be to improve the tutorial so players can understand the mechanics more easily and give them a little more control over the gameplay.
I hope to see more of your projects in the future! =D