I played this with a friend (having literally just searched 'slime' in physical games) and had a lot of fun!! There are some great tables in here, and the way you set up the area you start in before starting roleplaying helped us really quickly make a setting we were excited to play around in. The range of starting creatures, being able to choose from a wide range of strengths and weaknesses with roleplaying implications and being able to choose which level of the dungeon to start on were things that helped this feel particularly fun and un-punishing. I particularly liked the list of potential PC motivations! Our dungeon is built into a massive volcano and our Dark Lord is big on micromanagement, especially of the deeper levels within their stolen castle; our characters are a finely decorated roaming mimic and a jealous, ambitious slime created to clean, and we are Rival Predators of our floor. I'm excited to play out more and see what we can do - and especially excited to play around with the dice-swapping mechanic, that's really cool.
If you are interested in fiddling with this, it took a bit of guesswork to figure out what order to do things in after character creation and when roleplaying was supposed to start. We still figured it out and had fun though.
Thank you for sharing!