Napalm isn't the fastest game ever made, though it is playable for sure on a 030/50. Unless you're using a GFX-card you're stuck with low resolutions, though, because running Napalm in 640*400 or higher isn't really a pleasant experience under AGA.. but on the other hand, when running the game with a low resolution things get VERY big and because of this you will have some problems seeing what you are doing at times.
Nice game though, albeit a tad hard.