Sadly it's impossible to make a game that works flawlessly on every setup. There's gamma setting in the game that might help.
In the past I changed goo puddle sprites to be more visible as that was commonly reported and based on feedback of people who had this issue they said new version helped. But I don't want to change current sprites of wolf or the floor because I really like the current colors, so I hope once I expand gamma it will help as it's not pushed to maximum right now, which I thought was a good decision as otherwise people like me would have harder time fine tunning it. Probably adding an option to type a percentage would be best instead.
Thanks for reporting issues!