Pretty fun idea, and apparently pretty addictive! Artwork is really good, too. Watched my girlfriend play this up until 12500 points until she got too exhausted to keep playing.
It’s sort of weird how this game has a sort of reverse difficulty curve: While the enemy doesn’t really get any stronger, upgrading core tier levels makes defending your core so much easier. Also took a long time for that first core tier update to show up, not sure if that was intended? Also, in the end, gold production was so high that money wasn’t even relevant in any way.
Also, the different block shapes didn’t seem to have a huge impact on gameplay? Maybe I’m mistaken, though. I would have liked to see different kinds of blocks earlier in the game.
UI-wise, dragging blocks all across the screen was not the most fun thing, I think you could find a better way to handle that.
The reason I’m criticising this so much is that I think it really has potential, though! Even though it took like 20 minutes, I had a lot of fun watching my girlfriend fight for her core’s life and even formed an emotional bond with that cute little beating heart. With some rebalancing, I think this could turn into a really cool little game!