I love your game. Great voice acting, music, graphics, gameplay mechanics... Just incredible.
However, for the sequel, here a few humble suggestions.
1) Make tanking possible. When I play my guardian, no one attacks me. When I play my gunslinger, everyone attacks me.
2) Overall the AI is great, but sometimes allies make game ending mistakes. Perhaps allow for the 'option' to control their move for a turn.
3) Gaining levels automatically boost your stats so much that I am not sure how the allocated stat points really make a difference. Perhaps just get rid of the allocation process all together, or give more points that we can customize with.
4) Class specific armor is a fun idea as long as there are alternatives. It was difficult to 'customize' my guardian when I couldn't wear the most suitable equipment (since it was Destroyer only).
This does have potential. If this is your first game, then you will do great things in the future, I'm sure. Couple of suggestions. If she has a jetpack, then maybe allow her to jump while in the air (if you haven't jumped yet). Also, landing seems slow. Perhaps let the jump height or land speed be connected with holding/releasing the space bar?