That is the TI game "PEGS"
This is the game i played during math lessons...
Seems like u coppied it a bit so -2 for originality other than that it is perfect :)
although one thing i did notice, those are half life sounds :D
Some thinking needed, but not that hard.
I even just passed level 1
Reminds me of Chips Challenge
Cool game but I noticed that all of the sounds are from Half-life, not very original