I decided to just use Dosbox which comes with the game to play this game.
I'm not sure if I could put this in metroidvania category. It has traits of metroidvania but kinda missing requiring item for progression.
Anyways, ignoring that, good game. Kinda tough in deeper parts but not something I couldn't manage. Bosses are tough also though I think I beat them in wrong order. Skultopus (the first one I beat) is the hardest while SkelAngel (the last one I beat) might be the easiest.
I wish final boss' second form is less cheap (both in AI and animation) and allow more flexibility in attacking it. And subweapons could be repositioned to make them more useful. I ended up not using throwing scythe cause by the time I get it, I have no need for it. Holy water is useful but too bad I got it late. Crossbones (my favorite) is useful and I got it mid way.
Nonetheless, it's a good game and I had fun playing it :D. I love exploring all paths to find new areas and stuffs.