First and foremost, is the title a Steely Dan reference? I really enjoyed this even though I sucked at it. Eventually got into a bit of a groove switching my tools and zooming up and down trying to keep each row occupied. Obviously this would have been out of scope for a jam, and sort of goes against the design element of things ramping up more and more, but I was wishing I could buy something that could be placed and auto-shoot certain projectiles on a row, or get the ability to chain shots, so like shoot the pickaxe and that automatically shoots a cart right behind it.