Thank you for trying Probe! It is a good idea to read the documentation contained in the "Documentation " folder before you get started. Simply double click to view the document (you do need teachtext or simpletext installed). There are two files, one for Probe itself and another describing the use of the Level Editer.
Note that Probe is NOT released with missions other than the tutorial mission and you will have to aquire them through some other means. Drop by the Tatsquan Creek Software Web Site at skyport.com/tatsquan/ to download missions and get more information about this and other topics pertaining to Probe.
Probe is Trialware and this fully functional demo will timeout after a while. Probe is $12 and can be purchased and running within minutes online. The full version comes with a level editer for creating your own levels and other goodies. Check out our web site for more information on how to purchase probe and support the Macintosh platform.