Fun to see a scratch submission, I was not expecting that!
It's a good idea to put controls ingame, as people (like me) are stupid and doesn't read descriptions.
Ok so I sort of exploited how much you could get from the trampoline, because as soon as yo get a bit of speed you can just spin spin spin.
Some feedback: keep in mind how players can exploit the game, because they will exploit the fun out of it if they can. Test the game early so you can tell if it's fun and what you can change to make it more fun. Do a lot of research on gamedesign and make a lot of quick dirty prototypes, maximum a days work on them. Then when you have a prototype you think is fun, let others play it and give feedback! Then you know that the game will be fun from the start.
Awesome work, and congrats on submitting :D