Enjoyable and creative mechanic! A bit tricky to master but it is consistent. I feel it would work better if the level was bigger.
I'm not convinced by the pterodactyl following the mouse. Using the keyboard and assigning the pterodactyl a movement speed would work better IMO.
The visuals are simple but effective.
I like that you get upgrades from time to time.
Lots of nice details like the color customizer and the scoreboard.
The attack sfx has low volume, I barely noticed it.