Block Towers is a colour-sort puzzle against a clock. Every tower starts mixed; you move the block on top of one tower onto another, and a tower is finished when it holds one colour and nothing else. There is no luck in it — every board you are dealt can be solved, so a slow run is a run you can speed up with a better order of moves.
Levels run from three towers up to ten, with three levels at each size, and the board never grows past the screen it is on. The clock counts up and never ends a run; your time decides the stars, from bronze to gold, and the windows widen as the tower count grows. A level you have already cleared is still worth replaying for a cleaner line.
It is free with no account and no card, it runs in a browser and in the Keentune app on iOS and Android, and it is walled off from everything the trainer measures — playing it never moves your skill ratings, your practice streak or your weekly league rank, and a slow run costs you nothing at all. You earn XP toward your overall Level for clearing a level the first time and for each day’s daily — up to 150 a day across all games.
How to play Block Towers
Get every color back onto its own tower. The clock counts up — the faster you finish, the more stars.
1. Each tower has a home color — the heavy block at its base. That base block never moves; everything above it was shuffled across the other towers.
2. Tap a block, then tap a tower — or drag it there. Only a tower’s TOP block can move, together with any same-color blocks directly beneath it.
3. Any block may land on any tower that still has room, whatever color that tower is. Spare space is a parking spot while you dig something out.
4. On level 1 the level is done the moment every color is home. From level 2 you sort by color AND number: each tower must end with its numbers in order too — the biggest block at the base, counting down as you go up.
5. Each level shows three time targets. Beat the slowest one to pass it; beat the fastest for three stars.
Tips for Block Towers
Before each move, find the block you need next and see what is sitting on top of it.
A run of one color at the top of a tower can move in one go — grab its lowest block to lift the whole run.
On number levels, send each color home biggest first — a smaller block placed early has to move again.
A quick practice board — first sorting the colors home, then putting a tower’s numbers in order — then level 1 with three towers, your first move shown for you.