Great Giana Sisters?
Oh! That’s Rainbow Islands. I’ve been killed by that stripy spider enough to have it seared on my memory.
Don’t panic, maybe it’s a seaman? (although I think we’d done it).
Nope, but looking up Seaman’s box art I can see why you’d guess that!
Lands of Lore?
Lands of Lore for sure, well done :) Was a Westwood fanboy back in the day, loved that game.