If you close your eyes, of course things are going to look brighter and more colorful when you open them again. The feeling of bliss is because your mind is calmer. This feeling is a sign you're on the right track, but don't get too attached, it will come and go. And how good you feel is not a marker for how well your meditation went. I can pretty much guarantee if you keep practicing some days your practice will be really difficult.
Having obtained the supreme freedoms
and conjunctions of the precious human existence,
endowed with faith, energy, and intelligence,
Having attended on a worthy spiritual friend
and received the pith of the holy instructions,
May we practice these properly, just as we have received them,
without obstacle or interruption.
In all our lives, may we practice and enjoy the holy dharma.