Hotter? You have 2 huge ice sheets and extensive tundra extending well into mid latitudes. That is not hot compared to Earth at least.

One thing I notice is the relatively sharp gradient between the equator and the poles. I assume the poles to be very cold because of the large ice sheets but at the same time the equator temperatures looks similar to our ours, which makes a rapid transition from torrid to frigid climates. Did you say you have a low axial tilt or a large one?