Zacmario, man I have played your hack for a few hours. I actually reviewed it before I seen this post but it hasnt been posted yet. I really like your hack. It really does feel like it is designed to eat quarters and lots of them. Since I own more arcades than consoles I figured I would chime in. Its an awesome game, I like the level layout, the enemies population is just right, it has a Nintendo Super Mario Bros. Vs. feel to it. The new enemy sprites are cool and so is the invisible coins. Unable to scroll backwards is a nice challenge too. Overall, I really like what I've played thus far.
Onto a few things. On World 1, when you hit the vine block, climb to the "!" and warp to the cloud level, I found a small glitch after you come out of the pipe back on the main level, you can move Mario slightly to the right a little bit at a time and the screen will scroll backwards a just enough for Mario to hit the vine block again. Now normally this wouldnt be a big deal, but since a 1 up is possible every time one warps to the cloud level, a player could easily exploit this for 100 lives. I personally dont know what would fix this, but I would like to see if you could fix it somehow.
Last thing, and this is just me personally, I feel like the stages are lacking a few powerup blocks. I believe you are shooting for an arcade feel, but even then, I feel like a powerup should be somewhere near the middle. I might have missed them, but I tried to get every block I seen on each level. Other than that, I think this hack is rocking.
I am wanting to play through the entire game this weekend and maybe see if I can find any glitches or bugs and hopefully beat it.