I am happy to hear that you are enjoying the game. I packed a lot of content into the game and the better you are at exploring, the more you will get out of the game. I am thinking that the targeting problem you experienced was due to the mouse. If the mouse arrow/cursor is on the screen it has higher priority over manual target selection, so be mindful of the mouse.
I look forward to your continued feedback. I am hard at work on the next big update.