There are several nice additions to the standard shoot 'em up mechanics. You can, for example, harvest energy from dead/destroyed aliens to upgrade various systems on your ship, each of which can be upgraded five times. You can also choose to control different shpis, each of which has its own strengths and weaknesses. You can also play with another human player via hotseat (splitscreen) in both co-operative and duel modes. With a ton of power-ups, multiple upgrades, and fluid gameplay, Lacewing is another fun retro shooter that will delight every fan of the genre. Two thumbs up! Also, check out the superior sequel called Overgod if you like this game.