Thanks for the feedback! I really appreciate that you made account just for playing this game. I can see that you gave a very detail points i will reply on each point
1 : The area in the cafeteria area will be fixed tweak so she wont be doing that in the future updates.
2 : bug regarding room b2 has been fixed in alpha 1.3
3: in the next patch all the keys will have specific different shader so they will be easy to find also i am adding puzzle related bug fixes and changes to make it much more easier to find the numbers but at the same time tricky.
4 : I will be adding a mini ending in the coming update as well as a prologue. so i would be reworking the ending page of the game in future updates.
5 : Currently their is model in work for the player model so in the future update you will be also see the shadow of our player and not just floating key.
6 : yes i am very aware of the final number players can just figure out by them selves i am currently letting that in for now as its helping player escape. but in future will be adding another puzzle that would going to work in with this trick and will going to make it harder for players whom decide to brute force the last number so it would all be about risk and reward.