So originally, I was going to make a multiplayer (client/server based) Atari Combat clone.  However, for portability and easier distribution, I was thinking of making it into an applet client with the server being on the web server.  Is there a way to do this?  What API's should I consider?

Here's a basic description of the game:
Simple 2D map (no scrolling)
Overhead view
Tank moves in only 4 directions (unlike original that rotates and moves forward and backword)
Tank can only shoot 5 bullets at a time (no bounce, straight shot)
Maximum of 10 players
Random respawn (with variable delay)
Scoreboard

Would I just use applets for the clients and then a servlet for the server?  Would there be performance issues?