I think it's just because my computer is old, but the lighting didn't work for me): It definitely made the game harder though lol.
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oh! ya, it's developed using the latest version of Godot which might use the latest rendering libraries....but I had selected the lowest rendering option ie. the compatibility mode in Godot while creating the project, which should have supported ...but then it still doesn't support old PCs then :( ....thanks for letting me know