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I've addressed a lot of your points after your messages in Telegram, so for the sake of completeness I'll copy that here:
Thanks for the feedback! This is only the first iteration of the tutorial, and we'll be updating it if and when necessary along with the rest of the game. We are working closely with live testers for this, who test everything while recording their actions and providing commentary.
This plus community feedback helps us decide the next steps in the dev process.
I've also replied on Telegram to your question regarding relics; you can find them and their full description in the place where you equip them on the creature page.
With regards to stacking said creatures: since each creature will be unique as a token, stacking them would make it hard to see exactly which one is which. We are looking at ways of preventing future cluttering though.
This leads me to the next point, which is our dev plans for the near future! We are rolling out a new build this coming week to push through some bug fixes and improvements. Once this is complete, we will be working on UI/UX and gameplay improvements (which includes looking at game flow and shields).