I've now completed it too - I had 300+ health, 100+ mana and, er, 30 stamina at the end which I agree was a bit surreal (the ending, not the stamina).
Overall I would give this one 8/10 - it certainly had me hooked, especially at the start. Lots of nice touches such as the lower case inscriptions and the door opening noises. I liked the consistency of monster strength and the lack of spell restrctions - just what I went for in Angel's Egg - when you are weak run, run, run; When you are strong smeg, smeg, smeg and use any magic you got
As for replayability, I fancy another go taking on the extra characters. There is plenty of food (er,well mostly slime and worm poo but let's not be too picky) later on and lots of equipment so a 4-character party should be a goer, apart from them starting on one measly hit point!