Minecraft 1.9 Jetpack by Sancarn and Selulance

/summon FallingSand ~ ~1.5 ~ {Motion:[0.0d,-1.0d,0.0d],Time:1,DropItem:0,Block:redstone_block,Passengers:[
	{id:FallingSand,Time:1,DropItem:0,Block:activator_rail},
	{id:MinecartCommandBlock,Command:/scoreboard objectives add inAir stat.flyOneCm},
	{id:MinecartCommandBlock,Command:/scoreboard objectives add sneakTime stat.sneakTime},
	{id:MinecartCommandBlock,Command:/gamerule commandBlockOutput false},
	{id:MinecartCommandBlock,Command:/gamerule logAdminCommands false},
	{id:MinecartCommandBlock,Command:/give @a[m=1] minecraft:elytra 1 0 {Unbreakable:1}},
	{id:MinecartCommandBlock,Command:/setblock ~-1 ~1 ~ redstone_lamp},
	{id:MinecartCommandBlock,Command:/setblock ~-1 ~1 ~1 lever 3},
	{id:MinecartCommandBlock,Command:/tellraw @a ["",{"text":"Hello and Welcome to the Jetpack module made by","color":"green"},{"text":" Sancarn","color":"gold","bold":true,"clickEvent":{"action":"open_url","value":"http://www.youtube.com/sancarn"},"hoverEvent":{"action":"show_text","value":{"text":"","extra":[{"text":"Click to go to my YouTube channel"}]}}},{"text":" & ","color":"green","bold":false},{"text":"Selulance","color":"gold","bold":true,"clickEvent":{"action":"open_url","value":"http://www.youtube.com/selulancie"},"hoverEvent":{"action":"show_text","value":{"text":"","extra":[{"text":"Click to go to my YouTube channel"}]}}}]},
	{id:MinecartCommandBlock,Command:/tellraw @a ["",{"text":"Flick the lever attached to the redstone lamp to turn your Elytra into a jetpack!","color":"light_purple"}]},
	{id:MinecartCommandBlock,Command:/tellraw @a ["",{"text":"Make sure this module is in the spawn chunks.","color":"light_purple"}]},
	{id:MinecartCommandBlock,Command:/tellraw @a ["",{"text":"The jetpack only works in the survival game mode (gamemode 0).","color":"light_purple"}]},
	{id:MinecartCommandBlock,Command:/tellraw @a ["",{"text":"If you accidentally land somewhere","color":"light_purple"},{"text":" Sneak ","color":"aqua","bold":true},{"text":"and then","color":"light_purple","bold":false},{"text":" Jump ","color":"aqua","bold":true},{"text":"to return to flying, easily!","color":"light_purple","bold":false}]},
	{id:MinecartCommandBlock,Command:/tellraw @a ["",{"text":"Finally, the system only works between ","color":"light_purple"},{"text":"y=0","color":"aqua","bold":true},{"text":" and ","color":"light_purple","bold":false},{"text":"y=255","color":"aqua","bold":true},{"text":". So try not to fall into the void! Else you will die! ENJOY!","color":"light_purple","bold":false}]},
	{id:MinecartCommandBlock,Command:/setblock ~ ~1 ~ minecraft:repeating_command_block 5 replace {CustomName:1,Command:"tp @e[name=SGM4PropelSlime] ~ -1000 ~",TrackOutput:0}},
	{id:MinecartCommandBlock,Command:/setblock ~1 ~1 ~ minecraft:chain_command_block 5 replace {CustomName:2,auto:1b,Command:"execute @a[m=0,rx=20,rxm=-90,score_inAir_min=1] ~ ~ ~ summon Slime ~ ~ ~ {CustomName:SGM4PropelSlime,Size:0,Invulnerable:1,NoAI:1,Silent:1,ActiveEffects:[{Id:14,Amplifier:0,Duration:20,ShowParticles:0b}]}",TrackOutput:0}},
	{id:MinecartCommandBlock,Command:/setblock ~2 ~1 ~ minecraft:chain_command_block 5 replace {CustomName:3,auto:1b,Command:"execute @a[m=0,score_inAir_min=1] ~ ~ ~ /particle cloud ~ ~ ~ 0 0 0 0.02 100",TrackOutput:0}},
	{id:MinecartCommandBlock,Command:/setblock ~3 ~1 ~ minecraft:chain_command_block 5 replace {CustomName:4,auto:1b,Command:"/scoreboard players set @a inAir 0",TrackOutput:0}},
	{id:MinecartCommandBlock,Command:/setblock ~4 ~1 ~ minecraft:chain_command_block 5 replace {CustomName:5,auto:1b,Command:"/effect @a[m=0,score_sneakTime_min=1] minecraft:jump_boost 1 7",TrackOutput:0}},
	{id:MinecartCommandBlock,Command:/setblock ~5 ~1 ~ minecraft:chain_command_block 5 replace {CustomName:6,auto:1b,Command:"/scoreboard players set @a sneakTime 0",TrackOutput:0}},
	{id:MinecartCommandBlock,Command:kill @e[type=MinecartCommandBlock,r=0]}
]}