There's a lot to be said about this remake or at least the version uploaded on here. I wouldn't say the first stage is at 99%, there's still a lot to do to it. (Ammo refill, heal items, missing enemies, unfinished level art design etc.) It feels very unfinished to pass it off as 99% (65% feels more accurate.)
Additionally the controls are very strange compared to the original, crouch and jump being separated from up and down makes level progression very awkward. Kicking and aiming is much more limited compared to the original too.
While i respect the drive to remake this Classic H-game from Pixel Factory, there's too much work to be done in just the first stage alone and doesn't exactly feel like a proper remake in it's current state until some of these issues are addressed.