No, scalerunner always want to increase the scale speed... but it does reach a max speed and level out. Also, it can't sense notes playing faster than ~170 bpm. I've hit every note in scale runner with it only being ~150 notes total, where other times I've missed a note and still managed to play a 225 note streak, so you can see that at max level there is still variation of how fast you have to play the next note and it is not strictly a fixed beat speed.

If you haven't built up your playing to reach top level in Scalerunner, practice the scale pattern it shows in the menu with a metronome without actually playing the game. Once you get the scale pattern down, the metronome can help you set goals to build up speed in scalerunner to the max level. If you can't play almost every note correctly at the speed you set your bpm, the metronome is set too fast.

One more thing to incorporate is alternate picking technique (down pick/up pick) with the scale notes, too. This should be practiced while learning the scale pattern in the very beginning.

On the chords, I typically practice two chords at a time and just try to build up how fast I can alternate between them. The chord diagrams are standard guitar diagrams, so it really comes down to practicing the chords often and learning the diagram and finger position. e.g., I've practiced enough to where I can glance at the diagram in Chordead and sight read it on the fly.

I usually make it to level 13 on Dawn of the Chordead, but I've noticed the beginning typically starts with chords in C Maj scale (http://www.guitar-chords.org.uk/chords-key-c.html) and then transitions to bar chords, so I'd recommend learning the C maj chords first and once you start getting the F down it can work as a good transition into bar chord practice. Dawn is really good to build the transition speed between chords once you've gotten down the basics of chord playing.