Hi Binome,
Thank you for your post.
The hot keys for navigation are: Right/Left to navigate to Next/Previous K frame and Ctrl + Right/Ctrl + Left to move to the Next/Previous frame, also jump to 2 minutes forward/backward: Shift+Right/Shift+Left.
The mouse wheel unfortunately can only zoom the timeline. For zooming you can also set the preferred scale (also possible up to frame) by moving the appropriate control near "Save" button.