From the thumb I thought this was two superheros fighting. Unusual to see you using Chibi. Have you tried playing with the brush shapes? You can get some cool FX with that and combining the space and scatter settings with something like the smudge or blend tool. I always wish I could use shi's texture palette and watercolour brush with Chibi's pressure sensitivity and line tool. It would be an almost perfect drawing program.
drawn in 1 hour 15 min
drawn in 11 min
thanks!