Fun little time-waster game, and I enjoyed it.
My only complaint is that the ending is a bit anti-climactic. I was looking forward to seeing what was on the other side of the wall, considering it was the entire point of the game. But instead, the game just fades to black once the wall’s health is depleted. We don’t even get to see the wall collapse, it just glows and shakes a bit.
It's not a deal breaker, and I still had fun, but I do wish we got a bit more in terms of a reward for beating the game.