I enjoyed it so much, playing it during one weekend and constantly thinking about it while not playing it. "Just one more level/dungeon/upgrade" really kicks in and suddenly it was over.
The only annoying thing was the last boss. But I did it.

Completed it 100%, such a tight little package, couldn't put it down until I had all the clips. Glad they added the QOL features in later entries, balance meters and stuff.