It's good
Don't listen to those who say that the game sucks. It's a good game!
For one thing, you ACTUALLY made something based on SSB. The sound effects are really accurate and the music is really good, just like the series. Also, you did a good job on the characters. Sprites are nice and gameplay rocks.
However, there are some flaws as well. For one thing, the most infamous one is the forward trick. If one right clicks and presses options, then right clicks again and presses forward, it would take you TO THE NEXT LEVEL (unless you are in Break the Targets), therefore making unlocking characters a breeze. Also, the AI is rather primitive. This is very prevalent in the 3 and 15 minute melees. If you go to the topmost platform and keep on jumping, nobody will ever go there, thus making the job easier. There are also times when for some reason, you just fly off the stage like a freaking rocket...even at percentages like 70%. Worst of all, this game isn't 2-player friendly, unlike SSB. The screen only scrolls with the first player, so if the second player is standing still, and the first player's running away, P2's screwed. Finally, the sprites aren't somehow cut that well. Although I haven't used sprites for games (or made any movie or game, at that...), it's obvious that the sprites aren't cropped properly. There are some sprites that move really far if you only tap left or right.
So there ya go. Overall, it's a good game to kill time. I suggest to fix the bugs, crop the sprites properly, fix the AI and just fix what I mentioned. Do that and you got a good game.