You have given alot of feedback, thank you, I'll try to go through your points one by one.
The player's shape and round hit box was largely inspired by some lore that will be added in later but mostly by a mechanic that will be added later of camera and player rotation to make the arm waving and wall jumping more natural
On the player colours, the lighting in future versions will be a lot weaker, in future the brighter colors will really help with visibility, and the game would lean a lot more heavily into horror, but horror would likely just be the seasoning of the meal
I really like the idea of making this a Rougelite, so adding a robot character is a nice idea and I like the colour purple, so you have me sold on that
I probably will rather expand the tileset than change the current one to be able to as you said : "boarded the enemy ship and need to wipe them out/get to the reactor chamber and blow it up/etc."
I have prototyped a combat system, where you currently only swing around a crowbar, so defeating aliens wil be the next priority
And again thank you for your large amount of feedback