Windows Phone isn’t swimming in platformers, but thanks to Sega we have a new one today. Sonic the Hedgehog 4: Episode I is now available on the Marketplace.

Sonic 4 is the first numbered, 2D Sonic game in several years. It features four zones with three acts each, seven special stages (bonus rounds), and five bosses to fight. Fans of the Sega Genesis games will instantly feel at home with the gameplay. Sonic runs at blazing speeds, twisting through loops, jumping from spring pads, and spin-dashing to gain momentum. While the gameplay adheres very closely to the 16-bit Sonic games, Sonic does now have a homing attack to make attacking enemies easier.

Having played a few areas in the Windows Phone version of Sonic 4, I’m extremely pleased with this version. It looks and plays almost exactly like the Xbox 360 version. The touch screen controls (a virtual d-pad and a single button for jumping and spin dashing) are some of the best I’ve encountered in a mobile platforming game. Sonic 4 has all the same Achievements as the Xbox 360 version, plus a few new ones for completing the individual zones. One of the returning Achievements, awarded for beating the final boss without taking any damage, was super tough on the Xbox 360 game. Be prepared for a challenge if you want the full 200 points here.

Sonic the Hedgehog 4: Episode I costs $6.99, which is a lot, but remember the console version is $15 and this version has just as much content. The free trial contains the game’s first act so you can see for yourself if it’s worth the price tag. Grab it here (Zune link) on the Marketplace.