Either I'm too stupid or the triangles are broken so I can't complete the ritual. Also the very dark gems are very hard to tell if they are on or off.
Otherwise the goblin was very annoying which I imagine was intended. If you leaned more on the hectic aspect, maybe added some mechanic that made you scramble to find how to complete the next stage of the ritual while the goblin was messing up your previous one, and a fail state that punishes you for taking too long (it could even be that the goblin regenerates health) then it would've been a nice experience.