Thanks for the review.
Yes as it was a game jam I didn't find the time to give any feedback for the game over, so for a 72 hour game it just exists to serve it's purpose. I'm working on an expanded version that fixes this as well as adding challenges you can complete. This means if you struggle with the game there are challenges there, and if you figure out the holy grail of upgrade order and technique there will be challenges there for you too. There is no wrong or right way to play the game, but the additional objectives will serve to challenge players of all skil levels.