Shot Land is a great combined features of different games in one io game. You meet a lot of familiar features from many other io games.
How to Play
Main goal of the Shot Land io is destroying everyone who is against you (simply everyone) and earning points (growing bigger). There're 3 ways to get the mass:
by collecting color pellets that you may find everywhere on the map
by destroying circles, as circle is destroyed you will find some pellets and highly possibly new weapon
by destroying enemies, just like in Slither io you'll have a chance to acquire all the points defeated enemy had
Actually first reason to destroy circles in Shot Land io is getting a new weapon rather than receiving points. Also there're teleports appearing randomly on the map and transferring you to a random location on the map. This is quite a thing, do use them!
WASD or arrows to move
Left click to shoot
Scroll or 1-9 to select weapon
R to reload
F to use a shield (note that you can use weapon at that moment)