Deviating slightly from Compile's usual vertically scrolling fashion, Gulkave is a rather orthodox horizontal shooter. Flying across – or inside – a parallax scrolling landscape, your spaceship must singlehandedly take out eight fortresses. In your way stand enemy spaceships that either try to crush you or fire at you, as well as some asteroids thrown in for good measure. For each hit you take, your ship is not destroyed. Instead, you have a power (barrier) bar that decreases gradually until you finally lose a ship. At the end of each level, bonus points are given according to your remaining barrier. Losing a ship means you lose all your weapons upgrades as well. As usual with a shooter from this maker, the powerups come in the shape of numbered pods that are released from Zanac-style blocks. Different upgrades give higher shot counts, more simultaneous bullets or bigger energy waves. At certain score intervals, you're granted bonus ships.
The game was released for both the MSX and Sega's SG-1000 console, the latter version having two levels less.
You can control this game easily by using the keyboard of your PC (see the table next to the game). However, for maximum gaming enjoyment, we strongly recommend using a USB gamepad that you simply plug into the USB port of your computer. If you do not have a gamepad, buy a suitable USB controller in Amazon or in some of your favorite online stores.