The game's graphics and sound effects are really well designed in my opinion despite the simple game play and theme. For some reason, I enjoyed flipping through the 5 main stage categories which was implemented like the album cover effect for iTunes.
If you are interested in Stackus, you can scan the QR Code above with your favorite iPhone barcode reader and link to the App Store directly for download (if you don't have a reader yet, consider QuickMark.)
Overall the difficulties of the different levels and stages are well designed so that it will make you think, but not make it impossible to figure out. Stackus gets a 5 star rating in my book and I would recommend it to those who enjoy puzzles.
2 tips that I did not figure out until the later stages:
1) Adjust the orientation of objects on the left hand side first before moving them to the right. For example, a long vertical bar might be hard to balance sometimes. By picking up and dropping the bar against other objects, it is possible to make it lay horizontally.
2) We can nudge or adjust unmovable objects in the right hand side and place objects in spaces where it may sometimes seem like there is not enough room.
Spoiler alert! If you are still working on the game, do not continue reading as I will share my solutions for the last 10 stages for those who are interested. I am sure that there are multiple ways to solve the puzzle and I probably got lucky on some of mine. Anyway, here goes:
Tip: Use the red ball (circle) to tip the tack to the right. Nudge the bottom orange block with another piece if necessary (a bit hard to explain...)
Tip: Use dark purple rectangle and a red ball to form base and protection against sliding due to the slope.Tip: The dark green triangle is key to keeping balance because it is the heaviest. I also used it to trigger a seesaw effect to move the objects that were originally on the right hand side (and thus unmovable) to the left. Then you would need quick fingers to pick up falling object and drop them to appropriate locations for balance.
Once all 50 stages are cleared, you will be rewarded with a short animation saying "Congratulations!"