Glad you enjoyed it! This is an implementation from one of our users. Anyone can publish games at any time, so some of them might still be works in progress. This could be a great time to clone that project and try to add the changes you mentioned!
Good points! Currently, we give a fresh copy of the source code, but no conversation history, since it tends to be quite chaotic at times. However, I agree that storing all this data is great for analytics and could help out give examples to other users.
You can just buy powerups every 5 points you earn. The challenge is picking up the right combination of distance and speed. I don't know what power is for.
EDIT:
DOpe - I really like this game mechanic - It would be cool to be able to spawn more units ...
Also there is a bug in the game - the POWER button doesnt highlight when its purchasable...
Am I supposed to be able to move the character?
No keyboard input works - Main menu just restarts the game?