A decent, simple core game, but could really use a lot of polishing to it to make it shine. The game in itself is fun: stacking things is challenging and intuitive, the game escalates the difficulty well by introducing more and more varied shapes, and the rules are solid with the few seconds grace period to make sure structures hold. But while the concept is good, and while graphics aren't everything, the game is very dull and confusing at the moment due to the lack of graphics. Presentation is poor with bog-standard font/buttons and no frills, leading to a poor first impression. The lack of HUD makes it very confusing to determine what block is going to be used next: I initially thought my next shape would come from the right side of the queue on top, but instead it comes from the left, so it would be very helpful if there was an arrow or something pointing to let you know what the next shape is. Similarly, it would really help if the game would show an outline at your mouse cursor of how the next shape will be placed: it would make judging how the block is placed more intuitive, instead of just having to guess (for example, when you want to put it as close to the top of a previous shape). The game could also just have some more excitement to it: some tense music when you've built the tower and are waiting to see if it stands, some fanfare and explosions when you win, etc: it does have some decent sound effects for these but it could just be more.