Love this so much - intense and fast paced, with plenty of juicy visuals but still easy to see what was going on. The gun customisation is a fantastic mechanic, especially with the option to make a few different builds with the different weapon slots to swap and change as the levels called for. The gun "names" that resulted were brilliant too.
I found the game a little easy to begin with during my playthrough, and felt it might benefit from a slightly steeper difficulty curve, but it definitely gets more and more fun as the stages progress. The different enemies worked well, especially in combination - some stages encouraged low-spread, high power weapons focussing on accurate fire to avoid accidentally detonating bombs or triggering splitters, whereas others forced maxmising damage output to urgently reduce the number of enemies onscreen, leading to nicely diverse gameplay.
Really enjoyed this one :)