It's a nice idea and there's a lot of potential, but you have a lot of improvements to do as well.
1. The badges don't give any points. That's sad and sucks.
2. There's the already mentioned freeze, when the boss reaches the eggs.
3. It's much too short.
4. The eating of your killed enemies doesn't work properly every time, I think.
If you manage to make it more extensive and fix the bugs, this will be quite popular for sure! More bosses, more enemies, more waves in general. And of course more mutations and upgrades.
Keep up the work!