This was really difficult! But I liked it!
There could've been some sfx at all, but the actual core aka the mechanics were really nice, even if they could've maybe been tweaked more to be easier.
I like the screen shake effects, but other than that there isn't a whole lotta juice I noticed, which is fine it's a simple game and you definitely didn't need to overdo it. Adding sound would be enough to make it great tho.