If you are going to make the saws instant death, make some more room between them. It's too precise and that's gonna cause a huge amount of rage quits. (I could jump over the first two and barely made it through the second set with the dash.) So about a character's head more on either side of the main character to allow some error room.
That's isn't a "Slash" it's a Dash.
Make "R" on the keyboard a quick reset.
There's potential. But as it stands it's just a base small two obstacle course.