Wonderful game. I would have liked to see multiple endings. Also, a customizable control scheme would have helped. I wasn't terribly fond of it, but it wasn't horrible.
I'm curious about the other weapons as well. Lvl 19 intro was a hint about using your initial weapon to earn Excalibur... I wonder if the other intros have similar hints.
 "Time Kufc"){kind=icon}
 "Cube Colossus"){kind=icon}
 "Silver Maze"){kind=icon}
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 "Dynamic Systems"){kind=icon}