Not bad. The game does get a little bland after a while and it eventually just devolves into just hitting the arrow keys till you win. I noticed it mentioned but there are times where the runs become impossible if you do certain things out of order, like the bosses. It's possible that a boss or two might become inaccessible because keys will be with some and not others. It's possible that you can get screwed over on a full boss run. I also had a run where I think the hammer ended up behind a hammer wall because I ended up getting stuck trying to get around a hammer wall as it was the only way to get a few items I needed, but I got stuck with a few hammer walls. I think I got everything else, but I think the hammer walls had the dark tower key and the hammer so I couldn't finish the game. Anyway... It's a good start, but I hope you'll learn and make a better game out of it.
Aside from that, the game is a fun little time waster, but honestly, there's not really a lot to this game since all you do is hit arrows till you get everything. I don't know what I was expecting, but even the graphics leave a lot to be desired and just look like you put in a bunch of doodles and made a game out of it. After one or two runs this game pretty much runs it's course. It would have been nice if there was something a little more skill-based, but honestly this game's gimmick of randomness really doesn't do it any favors in the replay department.
This game would be a lot more fun and easier to tolerate if the game had more to it, but it is a good idea. The game is a fun way to kill half an hour if someone has one to spare, though I don't think this is really deserving of the front page myself.