Hi,
I played SuperTuxKart 0.6.2, the official version which is in official Ubuntu repositories. I noticed some issues with the game.
[*] There's a track in a jungle in which there's a portion of the circuit which is loosely condemned by a set of trees. But I still manage to go right through them and lose time on the abandoned track. Plus, player can be penalized of using an "invalid shortcut" too easily on this circuit, whereas on others (like the one which is set in a stadium), using unfair shortcuts is not even noticed by the game.
[*] The design of Tux's Highway is not acceptable. The player can go on the wrong side of the highway, and nothing allows the player to get back on the right side. Using the opposite highway ramp is too tricky (as this may make the player falling into nothingness), and player can go into the tunnels which are after the ramps until he realizes these lead to nothing.
[*] The first thing that at least 85 % of Mario Kart-like players do at each beginning of a race is to press the acceleration button. That penalty time for having pressed the wrong button before the race has started is just ridiculous.
[*] Handling the kart on ascending slopes is VERY tedious, because of the feature of turning very fast if the kart goes also fast. On some circuits, it just makes the kart completely out of control, spinning it for no reason.
[*] Is the music "Boom Boom Boom" supposed to be a complete tune? Hearing the same musical note for more than one minute after some nice chip tune is not what I call... "music".
[*] Nothing indicates the player how to unlock new tracks. I discovered it accidentally by browsing some wiki. So I'd like to say that the main purpose of karting games is to compete against other people in many Grand Prix. Winning some Grand Prix should allow the player to discover more of the game, not by doing some challenges.
[*] Displaying a general classification sorted by general score after a race would be nice.