This deck is a lot of fun to play and really focuses on the interaction with Terror of the Peaks with Genesis Ultimatum.

Early Game

As a midrange deck that is trying to go "over the top" later in the game with Genesis Ultimatum the focus early is on your three adventure creatures with the innkeeper.  

Bonecrusher Giant:  Early removal with stomp and a solid 4/3 blocker that you should take a trade with your opponent to keep yourself alive

Brazen Borrower:  Great tempo card with petty theft to slow your opponent down to remove a key piece of your opponents board at a key time.  Great to send Embercleave or Maul of the Skyclaves back to your opponents hand allow you to kill a creature they expected to be safe with that equipment.

Lovestruck Beast:  Solid 5/5 body for early game blocking and attacking pressure if available.  Also works well to get Great Henge on the board on turn 4 (or just to get your opponent to spend their turn removing the beast allowing you to ramp to your Ultimatum.

Mid and End Game

There is not a lot of ramp in the deck but there is enough to help you get the mana you need for Ultimatum with cultivate, the triomes and your Beanstock Giant's adventure.  Focus on staying alive with your adventure creatures while getting your mana right.

Terror of the Peaks is a great threat to get on the board the turn before Ultimatum if possible.  Often Genesis Ultimatum with a Terror already on the board is lethal.  A second Terror and a Beanstock Giant represents 19 damage assuming 7 lands and if you also hit an innkeeper too that's 20.

Matchups

Rogues:  If you are seeing a lot of this deck consider bringing in more Glimpse of Freedom and focus on using it to clean the graveyard.  With all your mana in the deck it is quite possible to use this card a lot and use the draws to get your adventure creatures on the board to keep pressure.  Also using Glimpse to clean the graveyard prior to your ultimatum can often make Drown useless against it.

Mono Red:  This matchup is very draw dependant.  You need to get a Lovestruck Beast ideally to have a solid 5/5 blocker.  Using the Borrower to take away cleave to allow a key creature kill or to avoid death is key.  If you don't get enough of your adventure package in your opening hand you will likely get run over.

Control Decks:  Focus on flooding the board with threats getting your opponent to use their resources there opening you up for the ultimatum later.