I was having some issues on Firefox but on Chrome it played a lot better. Fun gameplay, I like that holding right mouse button helps us aim better, I understand you didn't have a lot of time, but I could see this being a fun little multiplayer game, with more robot character variety and weapons. The coins and the plants were all dark so it was hard to distinguish coins from other elements. Good leaderboard integration.
Congrats on the submission and well done!