Just in case, a small Warning for potentional Spoilers for the Tutorial.
So an update on the Tutorial Achievement in 0.8.0e, and still didn't give it to me in the ways you are supposed to. Once again tried exiting to menu immediately, as well 'completing' the last part and exiting. I noticed the Achievement only stays for the second part, up until I either exit to menu or go to next part.
I tried something someone said that somehow worked for them, that did work for me as well is after getting the Achievement go to Settings and hit Apply. Now I also made sure die in Tutorial, so not 100% sure if the Apply or dying was what got it to work. But overall the bug is still there, and not sure why or how it's like that. Hope this is enough information on what it is and how fix it. Thanks for great game so far