just played GORN for 90 straight minutes. I actually think it is now in my top three. I'd say xortex26xx, the GORN, then space pirate trainer are my favorite ones to play for extending periods of time. I think once you implement a point system before u raise ur hands to start next wave, it would be awesome if you can throw the weapons and body parts at the lil heads in the audience and when u hit one of them you get additional points. Also maybe having enemies of a couple different sizes and after every 10 waves maybe toss in a boss that has a mask and some armor u need to knock off before you can slice and dice the enemy up into pieces. And other than the bow and arrow , some throwing stars or knives and some tomahawks would be cool to attack with before they get in close. Best of luck and I look forward to playing some more tomorrow.
RDiCicco