Here is my idea for a user interface for selecting powers, I will also be including power Ideas and explaining how it works.
The player is given a certain amount of points, each power costs points, better powers cost more points, any left over points can be used to upgrade fundamental stats like Health, ammo and how fast your special bar fills.
Power Ideas
Basic Power:
Portal Gun: Self explanatory
Stimulant: Boosts movement speed and health (Possibly bonus health)
Implosion: Like an explosion, but the opposite, drags all nearby enemies to one spot
Ultimate:
Stasis: Locks an enemy in place
Invisibility: Makes you Invisible to enemies
Dash:
I don't have any ideas for a dash, But it would be fun to be able to sacrifice points to get a more powerful dash
Please Like this or give it traction so that Steven can see it