Thanks for your comment!
To cheat, you have to add people with the surname "Cheat" on the spaceship. This will unlock new powers. And yeah, Hubble is superpowerful XD.
There should be an ending screen indeed, maybe it's bugged? I'll double check (after the jam is over, for correctness).
One of the main issues I had with this game is balancing the gameplay, I am surprised you made it without cheats! XD I need more playtesting time to adjust all the parameters and the progression.
Thanks again!