Surprisingly good. I'm not particularly good at FPS, let alone boomer shooters. I enjoy them quite a lot, though. But something I have always felt about them is they tend to drag from the middle to the end, specially in the last levels, where the priority is making them harder in spite of how enjoyable and well designed the levels are. Venturous fortunatelly doesn't have that problem for me. It lasts just the right amount and despite I died a lot, I didn't checked out in any moment. Hopefully the dev(s) will keep making games, I will be there to play them.