Although the game play is time consuming and simple, it seems much too, well I suppose the words im looking for is that its not exactly player friendly
For one, the base placement is a bit random, and will sometimes be so close to the water that you don't have enough time to replace sand under it and build up sand around your base
Another reason is that some crabs are somewhat easy to kill, while one specific one is nearly impossible to kill and destroys your castles within moments of reaching them
WIth note of the crabs, whenever one spawns you are forced to try and kill it and could die at any moment from the water, making it more of an annoyance to fight rather than a challenge
One final reason, involving the water once more, your base dies when the water reaches it, and looks as if falling, if this is the case, then it doesn't seem very practical as its more of a easy way to die

Good concept, but that's all :(

This game is a time killer! I play this while i download/loading other things

It really is a good concept, but the water drag system was just a little too random for me. I'd suggest fine-tuning that and maybe making a way to actually stop it once is gets so high. I like where this game is going.

Fun game! I like the wave action and the overall concept. I just need to work on my crab smashing skills!