Thanks for playing! This is a known bug caused by forgetting to account for edge cases when spawning the Microchips and Bonus Clocks. I wrote code for them to only spawn in empty spaces, so when space ran out, it just crashes :(, which I'm bit annoyed I didn't catch. For your second point, I did add tooltips for the upgrades, but perhaps I should have made it more obvious. If you hovered your mouse over each upgrade, a window popped up and told you its name, ability and current count. Thanks again for leaving a nice comment!