Sounds like scripture is at odds with the way god is described, then. This, also, is a problem with the Abrahamic god and the religions spawned from belief in it. A god whose nature is contradictory and for whom the supporting text is also inconsistent is unlikely to be real.
Are you sure about this?
God offered Adam either reward or punishment.
In Exodus you can read all about God's long list of blessings versus curses for the Israelites. The emphasis on the rewards in heaven's kingdom are further emphasized in books like 2nd Samuel and Isaiah.
And everyone here is familiar with Jesus speaking of entering heaven or being condemned to the lake of fire. To finish I can say Revelation and that would be enough.
From beginning to end, God offers reward or punishment.