I can only imagine the clashing and totally unfitting action music being intentional, at least I hope so because it's pretty funny when you enter a level and start driving this goofy lawn mower in silence.
The game is fairly enjoyable as a puzzle game, although I don't think the upgrade system adds anything to it. When you get to a certain speed there's very little reason to get upgrades, in fact it may even get more difficult if you upgrade too much. I also don't know what the weight does, and I there's very little reason to upgrade one side but not the other.
It's very not clear that you need to find a correct path, it took me several failures to realize that you can't go back to brown tiles. The game could use some kind of hint to reveal this fact to the player.
Although the game itself is decent fun, I think the theme itself is more or less completely lost.