I had a few more goes:
Your game might have a scoring bug though. When I press right and left mouse button nearly or exactly at the same time, score varies greatly.
I wonder if it is intentional. Do insects give varying amounts everytime? Let's take the first one right at the start: It gives between 16 and 48 points. Sometimes I end up with over 1000 points right after the first 5 insects. But most of the time I just have like 200 points after the first 5. Is this intended?