Sadly, playing this game is not that fun for me because lag is a huge issue. The thing is, guns will miss a lot even if the player was directly under your crosshair. I believe this is an issue with Minetest itself: It was never made to be a first-person shooter so doesn't take into account when quick responses are required. This shouldn't be a surprise since the same issue arises with many other FPS-style games for Minetest.
Other FPS games (non-Minetest) are much more reliable with this.
I give it a neutral rating because I want to recognize the depth and hard work that was put on it. But I cannot give a recommendation either. The game would be fun if the guns wouldn't lag so much. I guess on a LAN it would be more playable tho.