I like how straightforward the concept is, and I think the message about recycling and cleaning up the environment is easy for players to understand. I also like the idea of collecting different types of trash for points, and I think the retro 2D style could make it really fun and approachable. For Sprint 2, I'd focus on making the movement and collecting trash feel really satisfying since that's what players will be doing most of the time. It'd also be cool to add a few obstacles or different level mechanics so each level feels a little different while still keeping the game simple.