The idea is interesting, but I think the execution could be improved.
If you look at games like Ghostrunner, enemies are usually taken out in a single hit, which keeps the gameplay fast and fluid. Giving enemies health and quite a lot of it slows the pace down much more than I expected.
The same goes for picking up weapons. Having to hold the button for so long forces you to stop moving, which, in my opinion, goes against the fast-paced gameplay the game seems to be aiming for.
One last thing: the counter blocks quite a bit of the screen. Keeping it in the same position but making it slightly transparent could make it easier to see what's happening behind it