Hi.
While playing version 1.07, I've caught a minor exploit that gives me constant experience points.
This happens when I have the 100 poison powder in my inventory and decide to upgrade the poison skill.

After selecting to upgrade poison skill, I get the 100 experience and the skill.  However, I am also able to select to upgrade poison skill infinite times and gain 100 experience points each time as long as I have the 100 poison powder in my inventory.

I am unsure if this is considered a bug or if it's one of the game limitations for the beta current version.

P.S. I'm looking forward to the game release.

Yes, that's a bug. I found where the problem is, I'll fix it in the next update. It seems I set it to grant 100 experience instead of removing 100 items. You're supposed to lose the poison powder in exchange for the skill, and the skill has 3 levels.