Hi SuperBoaGaming, currently you cannot remap controls. We moved away from the previous input manager as it has given us a lot of problems in the past (for example a lot of users could not remap controls in 0.0.3) and only supports 4 controllers.
The new input manager we have transitioned over to (and used in the builds we took to events) is called "InControl" and allows us to support 8 players. Custom input is a planned feature by its developer.
It is not ideal to play the game with multiple players on a single keyboard though (as you come up against an issue known as keyboard ghosting or key jamming), you can find out more on this website:
Microsoft.com
SoporificDonkey
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