I believe there are cheats that you could use to overcome the more egregious problems. There's also a romhack that supposedly provides a "better" control scheme and some sort of aim speed fix. Don't know if either of those things are an option for you, but I've been meaning to try the game for ages.
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It's a shame, as the tech is great, but the game difficulty is whacked up too high (v few pickups etc)
And the bleedin' torch running out every few seconds is tedious
Was just reading how game went through lots of changes, from top down to 3rd person then 1st.