I removed it thanks, I only see three highlighted and one above that. I could be wrong.
If you look carefully, it seems that there's a line going up from the fourth one. The star representing the perk is hard to see because it's in the whiter area of the sky that's sort of shaped like this:
`I could be wrong, but it does look like there's at least one more perk. I hope so. The more variety and powers, the merrier I say.
Edit: Looking at it some more, I think there might be an additional 2 on either side that reach out from the base perk. It's hard to make out because the lines are overlapping with the eyes, but it seems that they branch out in a mostly horizontal diagonal, before radically shooting upwards like the ears. Again, you can see faint lines that look like the lines connecting the perks, but it's hard to see and I might be wrong.