It looks like it could become a good game, but with only one real level it's still pretty early in development.
I got tripped up from not realizing that you need to not only get the killer correct, but also find all relevant pieces of information and choose each of them and only them when you're making the accusation, or else get a losing screen with no indication that the suspect was correct but the selected clues weren't. I had the culprit correct on my first run but was missing one clue, and that really messed up my thought process trying to do it over.
I have to agree with LuckyDee that it seemed like a sorta arbitrary choice and I could have argued that another suspect was the perpetrator. If you think it would be possible to design cases where the clues narrow down the number of possible scenarios and only one person could have committed the crime based on the clues that are presented, then personally I think I'd prefer that approach.