Answer: make a game in 4 hours using http://videogamena.me/ :D
Here is what I did:http://gamejolt.com/games/platformer/go-go-graveyard-paratroopers/12583/
And here is the livestream of me doing it:https://new.livestream.com/accounts/2972969/events/1898819/statuses/12230413
Stacking on powerups was fun until I started dying repeatedly. I don't think the enemies are suited for a player that can only shoot to the left or right.