This is something of a classic game. It's incredibly fun. It is about high scores and survival.

User Rating: 8.5 | Mr. Driller Online X360
Mr Driller is classic. It involves you drilling downwards through different colored blocks. When colored blocks are touching and you drill them the will all disappear like a chain reaction. Falling blocks that are in groups of 4 or more of the same color will also be destroyed. Speed and chain reactions are the name of the game. Certain levels will give you a depth limit that you must reach to beat a level. Maintaining your level of oxygen is also thrown into the mix to make it that much more difficult.
Each row of blocks is 1 meter. Levels range from 100 meters to infinite (in which case you go for as long as you can!). There is also a quest mode it which you will be given a specific task for each 100 meters(which is how the game is subdivided). These tasks range from destroy 500 blocks to use only 2 tanks of oxygen.
The 360 controller thumbstick is the only way to play this game as the d-pad is not responsive enough. It the beginning you will take your time and plan out every move-- this will allow you to get through 100 and 500 meter levels, but other level require speed. You will need to be moving constantly, watch out for falling blocks, maintain your oxygen, and grab treasures on your way down. It is rather difficult considering you only have 3 lives. But no matter how many times you fail the game never seems overly hard and it so addicting that you get a little better each time.