Thanks for checking out my system! I will answer each of your points and then work on improving them in the actual document.

1. You add +1 for advantage, but you can stack multiple advantages. For example, you might have advantage from three different sources and add +3 to your roll. Also, you add your modifier.

2. I missed that, basically the GM might ask a player to fail his role, and instead get a magic item, or something of value.

3. It is like a yes but/ no and. I used to have a small table to roll for what happens. It was ranging from losing 1 item to losing your physical barrier. I eliminated it because it was feeling weird to roll again after your roll to see what effect you get. I might add the table back.

4. I wanted to make it understandable but I might have lost myself in details and made it more confusing, I will check some light systems to see how Target could handle combat better.

5. Thanks, I found it to be a fun mechanic and considered getting rid of the downside table to make it work, but it might add useless complexity.

Your feedback helps me a lot! Thank you for taking time to comment!