This is not a game but a musical toy.
You can make music by placing blocks.
Updates
v.1.1.1:
v.1.1:
Controls
arrow keys: move cursor
z: place a block / remove a block
x: switch to block selector
<block selector>
left or right : change block
z/x: switch to circuit editing
Blocks
Signal Generators (right/down/left/up/rotating): generate signals periodically.
Beeper: plays a little sound when get a signal.
Hints
Older Versions
1.1
1.0.1