Tidalis is a casual "falling blocks" puzzler by the developer Arcen Games. The basic premise of Tidalis is that the player must define the orient of each block, fire a beam from one block of a particualr color and that beam travels through like colored blocks in a direct that depends on the player-set orient. If three or more blocks are hit they are elimited. Losing in this game usually is caused by having the game area fill up with blocks although some levels have other special conditions. Win conditions vary per level; they may have the player eliminate a certian number of blocks of a certain color or eliminate a certian number of blocks in a limit number of moves.
I personally didn't enjoy Tidalis or think it's a very well design game. Maybe my limited time in the game suggests I didn't properly give the game a chance, but with the limited scope of a casual game like this the time I spent should be sufficent to determine the quality of a game. The concept of the game might seem good on paper, if you enjoy these sort of games, but actually playing the game failed to inspire or be an enjoyable experience.
The game encourages getting combos. When blocks fall due to the block underneath them being eliminated would also trigger and potentially eliminate additional blocks. In practice, however, the chance that this would happen was fairly rare. One could, however, attempt to tediously line up moves in advance. Again this might sound like a good idea but in a game like this where quickly lining up moves so the board doesn't, this process becomes a mental chore. When triggering a block it will take several seconds for the move to resolve and the player is unable to trigger additional blocks. If falling blocks are trigger the player is often forced to wait for them to impotently resolve before proceeding. Many times the necessary blocks aren't even available and I am required to wait for fate to smile upon me in the form of the blocks that I need. As a result of all of this, the gameplay feels slow, tedious and not particularly satisfying.
Tidalis doesn't support USB controllers - there may be a way to use a controller by adjusting the key bindings but seeing how the game is played I have a hard time seeing how it would work.
If you're looking for a game of this type, there are better options out there.