The current prototype is promising, as it shows a good foundation that is decently fun it its current state. Improvements I can think of would consist of new mechanics as you get further in the galaxy, better prestige mechanics, and more upgrade selection. I think the prestige making you larger and faster is fun, but could use a slight money boost, like 1.25x each time that adds (not multiply). Overall the game has a solid base that would be greatly enhanced by adding mechanics to make achieving further progress more enjoyable and rewarding.