This was incredibly inventive, playing heavily on my nostalgic side. I haven't done a review on this website in years, YEARS, and I've been here longer than the creator of tankmen, mr Johnny Utah himself, a friend luckily enough! This game made me sign in and give you 5 stars. I do think you should add a "Shoot above" option, maybe some diagonal if you choose but I'd be fine without. I didn't die during the teaser, but the difficulty was as I remember any NES game being; challenging at different paces. From certain jumps you can only make while shooting, to navigating the maze to find correct paths while looking for treasure, you feel that level of "don't die, there's no getting back to this spot"
My palms got sweaty, bro. that's a great sign! I'd love to see you make this a full game, and if you're looking for critical suggestions to make the game greater, inbox me for sure!
[May I also suggest a kickstarter, or even a place on steam early access to encourage your release of a final version by donating to you and playing builds of the game you release? Imagine the build up of playing a new chapter of the game...That's how telltale makes its money]