Thank you for testing!
E1M2's puzzles have been redesigned. I assumed you mean Artificial Heart (D0) by "first tutorial" and Binding Energy (E1, E2, E3, E4) by 'second "chapter"' but if I misunderstood please correct me.
Yes, this game was in an old DD. I did not steal someone else's old DD game and mod it.
Vending machines now play faster and give 25 instead of 10 when playing in Survival Mode. Hopefully this feels better, but if not, feel free to complain. Vending machines still use the old slow behavior in Campaign Mode, but if it doesn't feel good there either, let me know.
Infinite ammo lockers now wait until an item has been picked up before closing. The default dialogue control scheme has also been revised. Let me know if it's still uncomfortable.