Thank you for clarifying a lot of things (seriously, I needed that clarification for the drawing cards and the refill hand lol). Knowing what refill hand does, I think it's a fitting enough name- I just think a tooltip for it would be good. Something like "Hand size at the beginning of each round. Can be exceeded." Or something of that nature (you would know how to make this fit your game best). I'd add can be exceeded somewhere, simply incase something happens where someone only draws one and bases their opinion on all drawing cards on that one experience like me lol.
I also didn't realize the Thrusters, Power, and Reactor were systems, but that makes complete sense! (Also didn't even think to hover on the Tunnel card, so that's my bad).
Sorry if my response isn't super helpful, I can articulate well what is wrong with a game, but when it comes to solutions I crumble lol. Thank you for the response! I really look forward to following this game and seeing it grow!