None of the games can be without bugs. Some bugs are noticeable at once at testing, and some can be notice only at the certain combination of actions. Most of bugs found by you during the game. And, thanks to your reports about them, I can quickly fix it.
So, if you notice that some game mechanics are working incorrectly, or some event used to work before, and now you cannot start it, or even you just cannot press some button, spend a minute of time and write about it in the bug-tracker. In such way you can help make my games better.