There's money to be made in space, and the AstroDrillers are ready to grab a piece of that action. AstroDriller3020 doesn't directly give you the task of mining gems from asteroids, but instead asks you to catch the precious materials that the drillers drop.

Saving the Earth from incoming asteroids can be a tough job for physicists, scientists and military – even if they’re working co-operatively. Or saving the Earth can be done with just your finger. Black Hole is a great arcade-style app for the iPhone that lets you be the savior of humanity without all that science work.

Enjoy the weekend with these casual game deals: Sandlot Games has the Farm Frenzy Value Pack: five Farm Frenzy games (Farm Frenzy, Farm Frenzy 2, Farm Frenzy 3, Farm Frenzy 3: American Pie, and Farm Frenzy Pizza Party) for $12.99 until May 31. Sandlot's free game of the week is Pirate Island. Big Fish Games is selling Dream Chronicles for just $2.99 until May 30 ( use coupon code CATCH299 at checkout). Over at PopCap you can still grab the Bejeweled Bundle (Bejeweled Twist, Bejeweled 2 and Bejeweled Blitz) for $39.95. iPlay is selling Dream Day Wedding: Married in Manhattan for $2.99 until midnight on Saturday.

Here’s a design challenge to think about: how do you add a fresh twist to one of the most prolific genres in history, the twin-stick shooter? How many children of Asteroids are there? While Crash Course makes a valiant attempt to crack the code, and largely succeeds, it does so by standing on the shoulders of giants.

Far back in the mists of time, in an era known as "the 90s", there was a game for the Macintosh called Escape Velocity. It was a swashbuckling, spacefaring micro-opera that carefully blended RPG trappings and writing with classic Asteroids-style gameplay. Warpgate for the iPhone is, in almost every way, attempting to be a spiritual successor to the venerable Escape Velocity in pocket-sized form.

Stickbound is an interesting platformer that introduces a unique pole vaulting mechanic to the simple idea of running from one side of the screen to the other. You control Capt. Bloom (who will look familiar to fans of Gamenauts’ Spacebound) as you try to propel him, via stick, as far as you can through space while jumping across floating islands, asteroids, and the occasional hot dog or hamburger.

Mahjong has always been a fantastic way to pass the time, but mahjong in under a minute? That’s genius. Mahjongg Dimensions takes the three dimensional spin of Mahjong Dimensions Deluxe for the PC and gives it the under-a-minute Bejeweled Blitz treatment. What results from this strange combination is a game that’s as fun, fast, and as addictive as the titles that inspired it.

Mahjong solitaire has always been a terrific game, but if I were to sum up the experience in one word it would be "flat." Tiles are flat. The playing field is flat. Everything is just... well, flat. Mahjongg Dimensions Deluxe breaks from this flatness by offering an experience with some depth. Quite literally, in fact. You see, Mahjongg Dimensions Deluxe isn’t like any mahjong experience you’ve ever encountered. It takes the classic formula of mahjong and brings it into the third dimension.