Oh joy, what to say. Lets see... first thing to say is this game reminds me of the Dofus because of the similar graphics and Tristam reminds me of Inuyasha (white hair/ red clothes/ swordsman).
Well that's it for appearance, time for the criticism. The 'heal' spell gives more health and cost less mana than the 'greater heal' spell. Basic supplies in the store are way too cheap, take my word for it - i recommend adding 20x+ the amount to make the game slightly more difficult. Equipping items that are higher level than your character is possible and i recommend not to.
Thats all for suggestions, but I have one tip for beginning players that might help. When you choose your healer, make sure you invest in magic-based equipment so your character can heal more and have more mana points. Also, if your in a situation where your party is almost defeated, you can also heal your party outside a fight with potions and your healers spells (under skill section).
Other than that, 5/5.
This game was fun and worth playing. I am a tough critic though, i personally wouldn't refer a suspect innocent by only doing the eye trick, i don't think some of them were innocent but one of them was definitely guilty haha. Other than that, I do have 1 thing that drove me crazy in the game. Be more specific on how the clues can be used, i didn't know you could use them anywhere and on any individual. That would of made the game less confusing for some. Other than that, very fun game, good job :)!