A basic review:
Gameplay: 8/10
Simple and straighforward. Decide if height or length are more important and click. Would have liked more reason to choose length, since you'll usually not get higher with trampolines unless you're above them and thus you're almost always better off choosing height.
Music: 6/10
Interesting synth blend, but the underlying melody without all the extra random noise (and bird noises?) might be better. The loop is a bit abrupt, maybe work on that a bit too.
Replayability: 5/10
Easy way for medal/point hoarders to earn a quick 300+ points if that matters to people, but interest is hard to keep after medals have been won especially since personal high score aren't recorded.
Uniqueness/Pizzazz: 5/10
I like the animations on the bunny, and the background is simple but different from the blue sky ones most of these games have. However, there's no real spark that sets the game apart. It was a nice experience, but probably not one I'll remember for long.
Overall: 6/10
Not bad. It's hard to compete with the countless other "cannon" genre games out there, but I like the effort. Keep it up!