Project TI-Trek uses the serial and usb drivers available on the srldrvce branch of the CEdev toolchain. You will be unable to use this program to play this game without the aforementioned libraries present on your calculator.
As the "srldrvce" branch of the toolchain is not yet merged into master, you will have to switch and pull from that branch in order to build. To do this, follow the instructions below:
git clone https://github.com/CE-Programming/toolchain.git && cd toolchain
git checkout srldrvce
git submodule update --init --recursive
USBDRVCE: src/usbdrvce/usbdrvce.8xv SRLDRVCE: src/srldrvce/srldrvce.8xv * transfer both appvars to your device (or CEmu) *
git pull make * send the new appvars to your device *