The menu, intro, and tutorial were really impressive. The key art is eye catching and I loved the intro. An interactive tutorial that guides you through the mechanics is also a great addition.
After that, it kinda felt half finished. I was expecting to have to keep picking up plants, dropping them into the cauldron, and reloading from it. As far as I can tell, that's not the case, I just need to hit R to reload, although this only works sometimes and I'm still not sure why. The ammo types seem to be random, there's no clear indication of what you have loaded, and some of the effects are useless. I played through one round, which took quite a long time with no indication of how long the wave was, then got swarmed with useless ammo in the next.
The mechanics that are there are pretty impressive for a one week jam, but it's very rough around the edges. If there's one general trend it's that the signposting and feedback just isn't adequate.
Although it has some issues, this really feels more like an earnest jam game that just didn't quite get there than some so bad it's good abomination. In fact, the only thing that's really SBIG is the choice of sound effects. Even the music is just kinda nice. The graphics have some weird artifacting, maybe because I played the WebGL version, but they're really cute!
I like this game, and I'd like to see an updated version in the future, but I don't feel it's much of an SBIG game, in the best possible way.