Wow that was so mediocre. The music is great, but absolutely nothing has been fixed since the demo, its super short, and the art has had no change at all. It looks more like and atari 2600 game. I'm not trying to be harsh but you basically put no effort into trying to make this a fun/interesting game. also the last two levels don't even make sense, they have no collision except the spikes and coin things, the color pallet is absolutely horrendous too, their is no end screen just a blank blue screen, This would be okay if it was just a free game that you made in 3 hours for a game jam but its just not good or fun, In no way should this be considered a "finished" game, at the very least you could have followed the tutorials and made the physics actually work because right now you can just walk through wall and their is no challenge to this game at all. Its a disgrace to the nes. it ranks up with all the LJN games. the only thing the game is good for is the music. But this could have been a good game, all you really had to do was fix the Collison, art, and level design like I told you when you posted the demo, but no the "finished" game is just bland boring and has barely any difficulty, speaking about that the difficulty curve basically represents the stock market, it goes any way it feels. some levels are pretty challenging and then right after that you basically just have to move left to win. This needs a lot of work before being considered a "finished" game that you can say "this is free but you can donate for it" this is the pinacol of lazy game design. Im sorry, i want to say nice things but the only thing that I can say is that it is functional. the bare minimum, the bottom of the barrel for you to consider this a "game"
The music was good though.
You just need to put more effort into it