I think this is a really fun concept! I like that each tool has a clear purpose, and introducing new mechanics over time seems like it'll keep the gameplay interesting without overwhelming the player. The environmental message also comes across naturally through the gameplay instead of feeling forced. I think for Sprint 2 it'd be cool to focus on making one polished level that really shows off the core mechanics. Once players get a feel for using the different tools and seeing pollution spread in real time, I think the rest of the game will come together really well.