I really disliked the level design of Boltgun. When you need giant signs on the walls (I, II, III) with giant arrows pointing the way... I kinda think that's an obvious failure or lack of trying, regarding fluidity of the level design... A great and common feature that is often used to counter this is the use of a mini-map, very common in retro shooters, but mysteriously missing from Boltgun... Otherwise, yea Boltgun was mostly solid.