While the graphics and programming are nice, there are some other factors you haven't considered (in a run n' gun). It's supposed to be easier to hit your enemies than your enemies hitting you, here, the enemies have too much hp and they're weapons have more range/harder to dodge. Like the thing that sprays grenades everywhere on a raised platform, it's annoying to jump up and down to trade 1 hit for 2 hits on yourself. Same goes for the main, flying enemies, I can't hit them from the ground very well. Of course, the other obvious problem is the lag, thank you for thinking about the standalone, surprising, it lags a lot but is very not detailed, like the map and platforms are very simple and sparse...guess it's all in the old school art. I also find the power-ups pointless...I don't see a difference. I gave up when it came to the moving platform while breaking boxes part, the enemies are even harder to hit and the box have way too much health, I always fall off and take a lot of damage before I break the box, but by then, the moving platform is long gone and all I could do is fall until I die.