Gravity jump

I have a couple of thoughts / suggestions:

• There's no shown way to close "the log entry" message at the start. Maybe pressing any key should close it?
• It's possible to fall off the sides of the map. An invisible wall would fix this.
• When reversing gravity, the player's velocity is immediately reflected. Instead, you might want to reverse the direction that the player's velocity is changing.
• The end screen reads "If you would like to play again", but doesn't say what to do in order to replay.

Good work on this though. I liked the "Commander Keen" aesthetic too.