Wow. The execution and the art are sick! As someone who grew up with Doom II, this hits a deep nostalgic itch! Well done, my friend
Gameplay is good. The movement is smooth, and the mechanics I expect from an FPS are there
Enemies are pretty annoying; they get in my face. Not the most fun to play against
The UI is very readable and clear, and the objective is clear
Art is good, although I don't like pixel art. Which is interesting!
But the main point that made me quit is that after I reached all the way to the shrine that needs protection, I died. And the game returned to the beginning! I'm not going all the way back!!
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I hope my review helped you. If it did, then I'd appreciate a review-for-review. I need others to playtest my game. It is about the immune system. If you enjoy consuming things and cleaning up a messy place, you might like this: https://sardira.itch.io/cell-cleanup Thanks!