Well, Skullhead SS (btw, allow me to add, that, from a german perspective and all other people who know about history, that’s not a very funny nickname), it was definitely a good idea to use this nice Jazz1 Diamondus tileset. Unfortunately the level itself doesn’t meet the high standard of the tileset: the layout is quite confusing (way too many warps in my opinion!) and there isn’t enough eyecandy to hide those (too many) empty spaces i discovered while testing the level. The music playing in the background (“emphysia”) is a nice little Startrekker module, very chippy and oldskoolish (i actually like it a lot!) but not really perfect for this kind of Jazz2 level.
Conclusion: sorry, “Diamond cave wars” doesn’t get a download recommendation from me. It’s below the average of nowadays level making and lacks of both originality and solidity. I’m sure the author can do better (and he will! :-). I also thought about giving a 4.5 because of the cool music but i decided against. Again, sorry.