I had the DLC downloaded, but I didn't use any weapons or charms from it.

Inkwell Isle I: No deaths. Inkwell Isle II: Forgot to get the bombs for Djimmi the Great and Wally Warbles. 1 death (Grim Matchstick). Inkwell Isle III: 1 death, 1 retry (Rumor Honeybottoms). Forgot that the Twin Heart Charm costs 5 coins.

Inkwell Hell: Forgot to equip P. Sugar for King Dice and stubbornly decided to keep going. That was a bad idea and I wasted a lot of time. On my second attempt, I equipped P. Sugar and beat King Dice. The Devil took me 6 tries in total (including retries), which was more tries than any other boss in this run.

Well, that was my first ever speedrun and it was definitely an interesting experience.