Gnat Attack

Gnat Attack (also called Coffee Break) is a mini-game found in Mario Paint, in which the player must use the SNES Mouse to swat different fly-like enemies. The player controls a gloved hand (similar to the one seen on the title screen) holding a flyswatter, which must swat flying insects on the screen, before the insect stings the player's hand in one way or another. There are three levels, each with 100 insects; after defeating them, the boss, Watinga, appears. Completing stages causes Mario characters to walk across the screen. When the player wins the last boss it takes them back to level one and adds a small icon in the top left corner of the screen; there is no final level or reward, as the game will loop endlessly, gettling slightly harder each time.

Gnat Attack was modified into both a microgame and a bonus mini-game in WarioWare, Inc.: Minigame Mania, under the names Mario Paint: Fly Swatter and plain Fly Swatter, respectively. The microgame involved shooting the flies as they flew past a fixed target, while the mini-game was more faithful to Gnat Attack's gameplay.

Gnat
Gnats are the first enemies Mario faces in the game. They are unable to harm Mario's hand, so Mario should concentrate on the more dangerous enemies before swatting these puny insects.

Big Fly (conjectural name)
Big Flies are essentially larger gnats. However, they are the first enemies to use projectiles to attack, so Mario might want to take them out first.

Dragonfly (conjectural name)
Dragonflies are long, yellow insects that look like their real-world namesake. They use projectiles and are aggressive to Mario's hand. They are a considerable threat and should be taken out as soon as possible.

Bomb Fly (conjectural name)
Bomb Flies are Bob-omb-like insects that explode if they are swatted or left alone. The explosions from these creatures can harm Mario's precious hand.

Watinga
Watinga is the large robotic boss of the mini-game. Watinga is capable of shooting out stinger missiles and poison gas; he is also capable of flight. After being hit multiple times, Watinga will begin going into convulsions and subsequently explode.

Watinga's only other game appearance was in a remake called Fly Swatter, which was one of 9-Volt retro games in WarioWare, Inc.: Mega Microgame$.

Watinga also made a small appearance in Volume five of the Super Mario-Kun Japanese manga, in which he was brought out of the Mario Paint game by Lemmy Koopa. After colliding with Yoshi, Watinga was fused with him. In the end he was destroyed, and Mario was able to redraw Yoshi. He wasn't given a name in this comic and was simply called "Fly Assault Game's Boss".