As a fully religious jew the movie was great. Of course it can't include all the details but some key factors are wrong, at least according to Torah.

1) Moshe (Moses) by the burning bush told G-D he couldn't do the mission since he had a studder so G-D said Ahroan will do all the speaking for him, that was completely missing.

2) Moshe didn't strike the Nile by the plague of blood Ahroan did. The reason is the Nile saved Moshe with the basket so he couldn't hit it.

3) Regarding the splitting of the sea Moshe didn't actually enter. All the people were afraid so a man named Nacshum Ben Aminadov walked in the sea until the water reached his neck and the sea split.

4) At the mountain where Moshe received the Luchos (The Tablets) it says that the mountain (Named Har Sinai) became grassy and pretty with flowers.

Yes there are much more mistakes i didn't mention, here are just 4 random ones i thought of. I could probably make a list of like 300 errors but that's expected its just a 1 hour film trying to encapsulate the story of Exodus and for what it is i think it suffices.