Simply play story mode to get this one. Word 1 consists of 4 levels and a boss level.
Get at least 1 powerup as soon as possible and do your best to complete each sub-mission (collect all chests, powerups, etc) on your first playthrough. This will reduce the fatigue later on when going for the achievement that requires all sub-missions to be completed.
Remember, taking the same turns leads to very similar or the same obstacles. Keep at it and if you're having trouble either practice 1 path or try a new path that might be easier. Sometimes it's impossible to get a powerup without dying, so don't go for everything if you don't think it's going to be possible.