I really enjoyed this! It was a bit hard at first, but once I got going it was steady and fun, trying to get each next upgrade. It took some experimenting to figure out what each upgrade meant, but then when I figured it out, the pictures made sense. Well done!

For as simple as this was it was pretty fun! I really liked the upgrade system but some text to explain what they were would have been a good improvement.

I've got problems with resolution, some buttons are out from the screen. But the game works fine, congrats!