Fun game, until it bugged and now won't let me connect. My connection dropped while I had a level up screen active, and now it won't connect to the server after it loads. I've tried on multiple devices in multiple browsers, and nothing.
Certainly an interesting game, though I wish it had more multiplayer interactivity -- simply sending more enemies is more like sending the other player money.
This game needs some major tweaks -- including a mute button to get rid of the annoying soundtrack and sound effects. As many have mentioned, the physics also need some major work.
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