The Key issue should be fixed, but unfortunately you will have to start a new game. Not sure about the bug for not being able to have more than one creature. The title screen rebind control issue should be fixed.
All of the non-bug issues will be improved in future updates.
Thanks for playing Creature Keeper! There will be an alpha period launching soonish where you can support development. I'll be sure to put out an update when that goes live.