Limitation is smart! Took me a second, and first thought it was a bug because there was no visual effect happening but when i understood i really liked the approch.  Rest of the gameplay is okay but not really special.  But in the end its a completed game! Some more mechs and it would be a very solid game. 

The gameplay itself isn't that exciting (and honestly I think I just collected like 4 trash pieces), but the limitation is very clever. I think a simple sprint button would add a lot to the game already. There are also some small issues you can fix, like masking / Y-sorting.