This is a Tower Defense Hell. Start off with your manually controlled shooter, then unlock and maintain turrets on the field, delaying the inevitable for as long as possible.
With the volume of objects on the field, I struggled to parse through what was happening, but strangely enough, I noticed the notifications in the game in this context where as in games that don't apply such a stressor, I'd struggle to do the same. It's a bit of a strange phenomenon: If you're stressed, you're more active and you'll more clearly notice things. That said, it's a balancing act. While being too relaxed will cause me to miss things, being too stressed still holds up as a common problem that lets things slip by you.
I see you're dabbling with NavigationAgent. This game shows an introduction to it. Always remember, though, that it is not a smart tool. It needs love and care to work for you.
This is a strong show as a newcomer, with a strong presentation to back you up. You will go far as you continue to jam!