W for up, s for down, a for left, d for right. that is how normal for me, I have a distaste for turn around with a and d. For clarity, just in the description, you have to specific the movement go, otherwise, there is a confusion.
Just add a triangle indicate where the player facing, the model feels ambiguity. a simple yellowish or some color that highlights. You can draw an circle for the triangle to move around
About the model part, you can repaint the whole mapping section within like 10-15 minutes. It is that cheap. I once attempted with my classmate while we worked around a 3D Unity game. I goofed around the modeling part for an object, you can grab a random background and slap it into the wrapping texture part. So you can create a golden satellite and a shiny silver one too. Which also helps a lot to distinguish things around. Also since your game is quite low graphic, you can cheat by doing so. Making games is about knowing cheap tricks to cut the costs not work hard.
Your game is kinda the first game for me to review so I am quite sorry for using such harsh words. Except for the sounding part, that actually wanted to murder my ears literally.
PS: reading this in calm tone, I am not angry or raging. I just spewed out my honest words