As far as the tutorial content is concerned, I got pretty much what I expected. I really enjoyed the scavenger hunt mini-game though. The castle was well-made and had lots of fun nooks and crannies to discover.
Although the tutorial says it's not MTG-specific, it does focus mainly on MTG-likes, especially around the crafting and smelting systems. It is still a good starting point for things like general movement, liquid mechanics, digging/building common to the majority of major games for this platform, so still a good choice for players who haven't yet found a game they want to invest time in.
Haha, yeah I admit it's a bit MTG-biased if I'm being honest, especially the furnace. It's partially because Minetest has a Minecraft bias. I think making a tutorial completely generic is probably too hard and maybe would not be that helpful after all.