Thank you for playing and providing detailed feedback!
I guess the download is broken if you got a 404 which is incredibly annoying. There is an occasional bug when in the upgrade screen one of the flowers could keep moving backwards and crash the game. If I update the game I will be removing the backing up they do.
I originally had a plan for armor but I wasn’t able to add the ability to repair it in time so I set it to 0. If I update it will be implemented.
the player has about 6000 points to make it to the end. I could update the bar every 500 or 1000 points instead of immediately draining.