Silmarils is a French software house which had a very strong and unique artistic flair. It created amazing looking games back in the late 1980, early 1990s unfortunately cursed with average gameplay.
It is not like Colorado is unplayable, but controls feel unnecessarily slow and laborious, meaning that falling off cliffs is very easy and getting killed in combat is even easier for reasons attributable to the controls only.
Despite these limitations, the graphics and sound effects alone manage to create a unique atmosphere of adventure in the wild.
Bottom line: This is a game I would like to play from start to finish whenever I find some extra time. 7/10