Mr. HELI no Daibouken

"Mr. Heli no Daibouken" is a side-scrolling shoot-em-up game set in 2999 where players control a well-armed helicopter to defeat the minions of Mr. Muddy, who threatens the planet. Blocks on the levels either release crystals for cash or weapons upon contact, as long as the player has enough credits. Losing a life results in losing all money, so collect those crystals and manage your credits wisely.