Thanks for the great feedback! I'm definitely hoping to make an addition version that fixes some of the issues you bring up. The difficulty is interesting, I had gone in expecting the end game to be more intense as the enemy density increased and the play area shrunk, but it ended up almost the exact opposite where the beginning is very hectic until you can horde some resources and get a weapon.
For moving down corridors you can use SHIFT+WASD or SHIFT+HJKL to move 1 tile & end your turn instantly, but I think I'll need to come up with some more ideas on making movement feel fluid with the energy system.