Played through a couple of levels on normal and the port itself is great overall, but playing this game on a controller (joycons esp) without any aim assist is a nightmare (may be i should've started on easy tho). Also it lags like hell in open wide areas and especially when there is a lot of shooting going on simultaneously (even with decent OC cpu usage is pretty much always ~80-90%). After dozens of attempts and constant save/loading i eventually gave up during mission 3..
There are a few things I can do to make it faster (arm8 qvm direct running, overclock switch, compile code directly into binary natively). I assume that it is possible to add aim-assist, but I'm not really sure right now where to add such. Does anyone know if the vista port has aim assist or similar? From a google search I see the play station 2 official seems to have it, but I don't thing that is open source.