There's one huge, glaring issue on my end.
I cheated. I hate clicker games, I think they're annoying and encourage you to hurt yourself and your computer equipment. So, auto-click away!
Took me a minute to realize it, but at some point I just heard the Announcer from Gauntlet going, "FLASH GAME NEEDS RAM BADLY,"
I tried to limit it to 100 clicks at a time, and not only is everyone else right about the pacing, but after 1000 clicks I was level 1 with 40 kills. And in addition, those 100 clicks lagged pretty noticeably. And when I leveled up, I gained 1 point to spend. Given the number of stats, this is dumb.
After World 6, 2500 clicks, and 15 minutes too long, I was done. The only way to not make the lag harsh was to reduce the interval of my auto-clicker. At 10 MS between clicks, it was lagging badly.
Then again my specs are a 2 GHZ Dual-Core, 2.5 GB RAM, and an Intel Express 965. On the other hand, I can work comfortably multi-tasking CS3 programs. *shrug*