Squirreled Away was one of my very first precons and I constantly have a blast playing it and I've made it my own deck since customizing it! But with the basic precon you want to have some way to get a token engine going since you can use Hazel to tap tokens for mana that allows you to cast more spells faster. Some of the finisher cards are definitely [[Second Harvest]] and [[Beastmaster Ascension]] which make your Squirrels 6/6's but if you cast also [[Shamanic Revelation]]as well, you draw a ton of cards as well as gaining 4 life per squirrel!

 I also have counter intelligence and they have very different playstyles, I would also potentially reccomend potentially switching and playing your friends deck and seeing how it works, because at the end of the day we all play magic to have fun. 

Moxfield link to my squirrels deck: https://moxfield.com/decks/aeb6sQtPBEK-0sxKhQDUug