What a great game! It's been a long time since I've seen such a simple but fun little game!
Although it's fun overall, I could feel some parts of the game that were not well done during the playthrough, such as the small variety of plants, the small variety of enemies, the fact that sometimes the plants would attack the same enemy together resulting in wasted bullets, and so on.
Maybe we need some additive plants (to make the attributes of the surrounding plants increase)? Maybe we need some multi-functional plants (able to attack enemies in the sky and on the ground)? Some kind of plant that releases skills through interaction (mouse clicks) would be cool too!
Gosh, I can't wait to play the full version of the game!