Sorry for replying late to this. We did have the game's Itch.IO setup so you could donate on there but in trying out some ideas with a Steam DLC that unlocks special ship liveries we've currently got loads of Steam keys tied on there that we need to wait to be removed first. I contacted Itch.IO about it on Friday so I should have a response after the weekend. After those unused keys are removed I'll be enabling the pay what you want on it again, I'll update everyone with a post here on when that happens