After playing the demo for a while, I would say its more RPG than platformer, except for the trap evasion bits, which I am really bad at.
I am not that deep into it yet, but there seem to be tons of items, magic and alchemy (with ingredients and recipies). There is an experience system. I only gained one level so far, it takes a while. Leveling lets you increase 5 SPs among weapon skills, constitution (HPs), armor (efficiency, I assume, armor also has armor rating), wand use and potions. Level restricts maximum skill level. Weapons have different abilities (e.g. daggers can do extra backstab damage). There is quite a bit of dialog, but no dialog choices so far (I take back my comment about the language though - apparently that is the separate "UnEnglish" language setting that you can choose in the setup
The normal english is fine). Lots of game references, and RPG related jokes.
Game looks quite nice, especially the lighting, which is also a nice mechanic, as you light hallway after hallway, marking your progress.
On normal it is quite hard, I died several times.
Game autosaves regularly (on normal) and you have ingame saving/healing hotspots. No manual saving and no separate savegame slots though.
I'm having fun, nice little indie game - give it a try!