Open source, Open mind.
MasterPiece Java Edition

This is a java applet version of MasterPiece which is roughly based on the Atari 2600 game Acid Drop.
How to Play:
First wait for the applet to load, then click on it to give it input focus Use the left and right arrow keys to move the block
Press the up arrow to swap the blocks
Align 3 in a row of the same color either horizontal or in vertical direction
Speed increases over time. Or press the down arrow to move the block down faster
Note this requires the Java plugin for your Browser.