Although I liked the idea, there's a few issues which made it feel a little frustrating in parts.
1. Having to get every seed is a bad idea. You should be able to win by just saving one so you can a go at trying to complete it, and then go on to try and beat your score/time.
2. I know the tutorial is very brief, but it's still a little annoying to sit through it every game. Restarts should be really fast.
3. I enjoyed the mix of different hazards except for the guns and stomper. They seemed out of place in this game.
4. Some hit boxes seemed off.