We apologise for the late review:
This was a fun experience! It was very easy to pick up and the upgrades all felt very nice to add.
Some notes:
- The game window didn't shrink when exiting fullscreen
- There is no concequence for not destroying something - I quite enjoyed juggling things to prevent any enemies from reaching the right edge until I got too powerful for it to be tricky. An insentive to keep doing this would be great!
- The text on the progress bar got obscured by the progress
- It wasn't made clear in game what the things you are fighting are
- There wasn't any audio
- It'd be nice to see some polish such as more customised UI, a background sprite, a menu, high score etc.
Your game design document is really good and will give you a strong foundation for developing this further. Well done!