I'm going to assume people who gave this a bad rating aren't familiar with "I Want to be the Guy" which is the game this game is based off. In short, the bad graphics are intentional, the unfairness where you have to trial-and-error is intentional, and so forth.
"I Want to be the Guy" is meant to be a sort of parody of illogical unfair "hard" games where the difficulty isn't in legit difficulty but in the unfairness and stuff you had to know ahead of time that you couldn't possibly logically figure out the first time through. And "I wanna be the flash game" is meant to be the Flash version of that sort of parody.
It's meant to be a true test of patience. Oh and if you don't believe I got Zero Hero, go check the medals page.