I had fun while it lasted, and it was really cool to see a co-op game this game jam, however I couldn't get very far. I'm not sure if I'm failing at puzzle solving, or if there was a glitch, but I couldn't find any way to get past level 4.
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The best way I can think of to give a hint is get your players to these positions!
I suppose I should have made it more obvious that the green blocks aren’t player blocks somehow… Thanks for playing through my game!! I promise every level is possible, one level might just need a “restart at last checkpoint” because you can get stuck (bad level design on my part, feel free to direct any gnashing of teeth my way).