Well done!! Really, the game has some flaws, but it was VERY fun to play! There are some things you could have improved/done better, I will try to list them.
1) SKILLS: skills are pretty basic, weapon damage, exp, money, critical or health. Some of them make your char directly stronger (health and w.dmg) and indirectly (exp and money). The bad part its the fact that they are too simple, theres nothing original on them, the difference between choosing a weapon is only the aspd (apart from bows, since they use dex), with 20 in the weapon skill and some strength, it really doesn't matter if you are using sword/mace/dagger. You could have made a talent system, so that the player could specialize in a weapon type, making ACTIVE skills with cooldown time/mana usage.
2) EQUIPMENT: I have to say, I was very disappointed with the equipments. Basically its a bunch of weapon and like 4-7 rings, there are no weapon with a unique effect, some of them have elements, but they don't make any difference at all. Since money is the only thing you need to get a good weapon (even the very first shop sells the best weapons), you won't use most of them, since you can just jump to the most expensive weapon and be godmode. You could have done different equips, especially with unique effects (for exemple, axes attacks have a 270 degree range, maces have a chance to resonate nearby enemies, swords have higher critical chance, daggers have a chance to strike twice, etc...).
3) ENEMIES: Well, if you played the game you already know there are no boss, and to me this doesn't make sense! Theres no challenge in the game without a boss, its just a bunch of common enemies trying to kill you. Without a stronger enemy the game just feel like the same thing over and over again, I mean WHY are there health potions?!? The only potion I used the entire game was the antidote, because the poison is the stronger enemy in the game. Without a boss theres no challenge, without a challenge the game doesn't feel rewarding at all.
4) POISON: Sorry but I had to make a chapter just for this. The poison is, without a single doubt, the stronger enemy in the entire game! Even being lvl 6x at the end of the game and having around 18k hp, I could die in less than a minute if I forgot to buy antidote. The only time I died playing was when I got poisoned in the middle of a cavern and I had no antidote, after that I bought 50 antidotes from the shop and never died in the game again. It just doesn't make sense, try to make it like a curse, not a terminal disease (for example, make so that It will reduce 50% of your -current- health, or increase the damage received by 100% while poisoned, etc).
In overall you should be proud of yourself, but next time try to make it more original, adding creative mechanics to the game. I'm sure your next game will be AWESOME!! =D