Amazing job! Honestly, I didn't expect much, but this game has a great potential. It's already much better than RTL Biathlon 2009. The locations and the tracks are amazing, the controls are nice too.
What's missing for me? I'd welcome if there was more than 20 biathletes competing. It would be then perfectly realistic and more fun, too. If the attributes could be changed by time, that would also add some bonus points to the gameplay (increase by successful races or decrease after a bad race/age). Some training too and then definitely some advanced shooting mechanism (holding breath/stamina affecting the stability). And then relays (NPC biathletes competing with you).
That may sound like there's a lot missing, but not really, it's all just minor details. The game is fun, challenging and actually quite unpredictable. Great work, please, continue! I'd really buy it when the full version is done.