Drelbs is one of my favourite 8-bit games but I couldn't find a 5200 version. This is a port of what I think must have been the cassette version as it ran in 16K. There was no title screen so I've added one with a speedy rendition of Wilder Reiter. I've changed nothing in the game itself other than to remap the keyboard controls:
START - restart game (at any time)
# - press this for difficulty selection, then press * repeatedly to select difficulty, then press START
PAUSE - pause game, press RESET or 0..9 to resume