A really fine and fun adventure platformer. The platforming is a bit jank and at some points feels like it was an afterthought but the variety of weapons are really nice even if some are clearly outshone. The idea of incentivizing killing enemies by making that the main way to get upgrades was also quite clever.
If this game was released a generation later and had a bit more refinement I could see this being poised as one of the best games of it's time. As is it's a game very much worth playing if you aren't put off by some typical PS1 jank.