the background of the charge bar doesn't stand out against the background of the game, so i can't tell when it will be full until it's full
the charge bar charges very fast. i could complete the game like this, but for many people this is too fast
i can't tell where the exits are before i reach them. so i'm not excited to reach the exit, but just mildly surprised like "oh, i completed the level i guess" because i expected the goal to much farther. this is not an issue in level 1 because it has a ">>>>" goal sign