Top down game: slopes/hills

If it is top down then you would be simulating the speed/direction changes of a hill. Definitely possible

Yes, but how I do it? I have trying everything.

I would use variables for each slope like: Var_SlopeDirection, Var_SlopeInclineDecline

Then use something like

is ball overlapping slope

& slope is direction X - set angle to ball.angle+1 or -1 (depending on slope direction)

& slope is incline - set ball.movementspeed to ball.movementspeed-1

Something along those lines to simulate the effect a slope would have on the ball