After a suicide attack gone wrong, Alice and Artaius meet up with a reaper who could not let them on to Heaven nor Hell, so they were sent to another world of their choice with one power of their choice. they choose the engineer's power from Factorio and the engineer from space engineer's

MLP:FIM belongs to Hasbro entertainment
Factorio belongs to Wube Software
Space Engineer belongs to keen

Alice is sent deep into the Everfree forest

This book is one of two, find it's twin on Knight-Ajax's page