Good job on winning with only the beam and drone, the intention for rail cannon is to clear out resources faster, but with some yield and radius upgrades it becomes quite potent. We actually wanted to go for that kinda old school flash game vibe. The whole theme is to not take itself too serious.
Now that you mention ULTRAKILL, I should've added a coin thrower weapon which would've been such a great easter egg :D Something for next time, thanks for playing!