Since 2004 ZUN has released trial versions of his games at the Touhou-themed annual conventions called Reitaisai. This year, however, due to the earthquakes and tsunamis in Japan, Reitaisai was postponed and the three-stage demo for Touhou 13, called “Ten Desires”, was released online for free. Like all the major games in the Touhou series, Ten Desires is a vertical danmaku shoot ’em up set in the fictional world of Gensokyo. According to ZUN, it’s easier than his previous releases and is meant to be more accessible to beginners.
In TD, you have a Trance gauge that fills up as you collect spirits, up to a maximum of three bars. If you have at least one bar filled, you will automatically enter a “trance” upon getting hit, rendering you impervious to bullets until the gauge runs out and you die. If the gauge is maxed out, you can enter the trance voluntarily and you won’t die when it ends. Spirits are worth more points while in a trance and you also do more damage.
Aside from spirits, which come in four different colors and have various properties, enemies also drop the usual red and blue items. Red items increase your firepower and blue point items raise your score. If you head to the top of the screen you can suck all of these power-ups in (point items are also worth more up there). Finally, there are bombs that can be activated at any time.
For more information, check out the game’s manual, in English. You can download the demo either from the game’s homepage (it might be very slow) or from Mediafire.