Is anyone else playing this? I've been playing it when I can over the past fortnight and I'm really enjoying it. Just two more levels to complete on normal difficulty. It's hard to put my finger on just what makes it work so well. There's not just one stand out feature, it's every part of it has a little bit of magic sprinkled over it.
The music is superb, not a single duff track. The artwork is terrific, really making use of the limited palette and the blocky level design. The main character is incredibly agile whilst still feeling like you're helming a walking tank. The weapon system is really clever whilst not being overly showy or out of place with the retro aesthetic.
Overall, it absolutely nails what GMTK talk about in this video about 'doing retro right'.