Hey SheepOverload,
Sorry about the problems you're having. The pause menu on the keyboard is P or Enter. Also theres a new update available with a lot of bug fixes:
v.1.0.4
Game Breaking
º Mountain Man Bounds when 1 Player Fix
º Dungeon Hole and Camp Spawn Overlap Fix
º Overlapping build objects/trees Fix
º Opting out from tutorial town Fix
º Car Falling Under Bridge Fix
º R2 Places Multiple Objects Fix
º Towers stop shooting after dungeon Fix
º Tutorial Zombies Touching Base Bug Fix
º Quitting To Menu Bug Fix
º Xbox One Back Button Fix
º Full resources Bug Fix
Annoyance
º Rounded Stumps
º No Harvest Corn on Attack Prompt
º Cutscene Survivor Collecting Wood
Game Design
º Check Website for Updates on Title Screen
º Upgrade Walls Objective Fix
º Skip Tutorial Option
º Lose held resources on house death
º FeralKid not counting towards herd count
º Grimkey Attack Faster Cooldown
º Zombies by the Sheriff
º Can Move Mistake Walls During Tutorial
º Gate Closing on Zombies
º Less Attack from inside gate
º Dash on Save
º Max Gas Limiting
Visual Problems
º Manual Save Confirmation
º Arrow on Car Showing up after Dungeon
º Cave Overpass Variation 45º
º Clear Herd Overlay
º Store Prices Red if not enough
º Save Option Grey Text During tutorial
º Bullet Box Arrow
and more