How to play Gaia Seed: Project Seed Trap on Mac

Gaia Seed is a horizontally scrolling shooter from Techno Soleil. The game comes from the fabulous line of classically-styled Japanese shoot 'em ups, bursting at the seams with parallax scrolling, screen-filling bosses and other classic effects that you could count on from the games of this era. But the real beauty of GaiaSeed lies in its subtlety. The game has tight control, precise bullet collision, and a simple powerup system, while the haunting soundtrack stands out for its techno/ambiance mood, adding to the subliminal nature of the work. You have a single ship choice and three difficulties. Gaming veterans will want to start on HARD, which differs only slightly if at all from NORMAL, and isn't particularly challenging anyway. You get two extra credits in NORMAL, for a total of 5, which is ample if you want to credit feed your way to the best ending. No one should touch EASY, since it limits you to reaching Stage 4. There are 7 stages with 3 possible endings, none of which are affected by credit usage. Power-ups consist of 2 main shots (RED and BLUE), 2 sub-weapons (YELLOW and GREEN), and an eIntense Shot' based on your main weapon which basically acts like a Power Bomb. Main weapons stack up to 3 times (RED: starts on 1 shot then 2, 3 and finally 4 shots), sub-weapons don't stack. Lose a ship and you lose your sub-weapon, while your main weapon goes down one level. BLUE is the Laser Shot, a straight line weapon with strong frontal attack which increases in thickness and power as you stack it. The laser's eintense shot' is a massive sausage of light cutting across the screen and wiping out all in its path. RED is Needle Shot. This is your typical V-shot weapon. Less powerful than BLUE, but when stacked 3 times has a wide ranging spread. The intense shot is a series of blue homing orbs target enemies and weak points on bosses, making this the best main weapon. GREEN is the Cipher Wave, the best sub-weapon since it fires four blobs which home in on ene