Lan Multiplayer update

This update includes the Lan Multiplayer mode. You get two modes in multiplayer, Race(first to the bottom of the level) and Gems(first to collect 100 Gems), You both play in your own levels but can see where the other player is. Both modes includes two new explosives The Teleport Explo and the Teleport Dino. Hitting these will make them teleport into the other players level as a live explosive so hit as many as you can. Multiplayer has not been tested a huge amount so expect a few bugs here and there. This update also includes a change to both easy and medium difficulties in the single player mode where they now come with 5 and 4 hearts respectively. There has also been a little bit of invincibility timer introduced. This does not effect blocks falling on you, chuck, or comet but it does work for cannonballs, spikes, fireballs, iceblasts, meteors, jellyfish electricity. Anyway, enjoy and let me know of any bugs you encounter