Ok, this experience was... weird. 😀
You have implemented only a single wave of aliens. I wouldn't even know that if I hadn't read it in the comments. I didn't catch them at all, as I was reading your description while the game was loading. hahaha 😁
I just had to restart the game to get those plant-hating alien sons-of-... some other aliens, I guess 😁
Jokes aside, a watering pot as a main character?
Yeah, done with trolling. 😉
Considering this is the first time you're using an engine, and that you didn't have much time, it's fine little alien-ass-kicking experience, even if just from the second try 😀
Take care.