Thanks for the feedback! The upgrades you buy are only there for as long as you can sustain an income high enough for more of them. Each time you die you can upgrade your ship once but If you don't have enough money that's game over man. The goal was to make a space survival game and it challenges you to live for as long as you can. Yet in the 10 day deadline we didn't have enough time to properly convey that information to the players.