Twice now, I've run into invisible objects and exploded. First time in the second zone, second time in the third zone a while later. I'm fairly certain that's not supposed to happen.
Nevertheless, it's certainly a fun and very addictive game. Could use some polishing in balancing and the like (For example, the magnet is far more useful than the speed upgrade) and for some reason, zone 2 feels a lot of difficult than zone 3.
4/5, great game, would recommend.
Whew, game finished in 29 days.
Didn't even have enough time to get all the upgrades. I guess it's very luck-dependent, since you don't get control of boss post launch.
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Thanks for the feedback! We'll have that collision bug fixed in the next published version.