Its a blast!
THIS GAME REMINDS ME OF MY CHILDHOOD!!!!!!!!!!!!!! IT IS SO AWESOME!!!!!!!!!
Honestly, this is one of the greatest games I've ever seen posted on the web. I don't know how it was done, but every single game represented here feels perfect, despite being very different from its inspiration. There really aren't very many things that I can think of to improve here - the only thing that could be considered a major flaw in any way is that it could've been a bit longer. The 8 levels do have some replay value, but it'll only take you an hour or two to beat them all in sequential order, assuming you don't suck. It'll lengthen the game time by a lot if you try to get every achievement, but you might be disappointed with the length if you're not a completionist. Despite being a love-letter to the NES days of gaming, it's honestly not all that difficult - you can start from any of the 8 levels that you've already seen, you have more than enough health and lives to get through any one level, and you've got infinite continues too!
Overall, if you're reading this review and you haven't played the game yet, what are you waiting for? It's right there, dude.
I am having a bug which makes me lose my progress everytime i refresh. I was halfway done with the game, and when I came back on it, it made me start all the way over from the begining! What do I do?