I agree with all your points. You have a really good eye for games! I didn't have time to polish it so it is what it is! :)
Just wanted to add a few things because you were so nice to review it so well:
Yes there is a bug where the goal objects sometimes will unintentionally push a player to the next level.
The test flickering is intentional.
There is a "final screen" but it's press any key to continue, so yes it appears to be a loop because most people are pressing on the button to play when the screen comes up.
So yes, for it to be a "real" game, it definitely needs more love! Thanks for playing! :)
