Erik The Viking!
Atlantis Software released Erik back in 1992 and it's a vertically scrolling platformer that features dozens of levels spread over four worlds. Of course, each level contains a fair few baddies, cool traps and scary end-of-level bosses. The graphics are cute and cuddly with nice detail and super smooth scrolling with raspy samples for sounds.
Overall, this is a really simple platformer which is entertaining and challenging. Loads of fun!!
Floppy disks can be found over on AtariMania.
Klaz has a fantastic hard disk download!