Is this polysynthetic?

I started to scetch out a polysynthetic language, but I'm not sure if it
realy is polysynthetic. Here's the only sentence I have so far:
juwa tetwanata ji ki.
juwa tetwa-na-ta ji ki.
house-[placed initialy, marking it as the topic] go-[tells us the object
is the topic]-[tells us the subject's either ki, I or kwí, you] [marks the
verb as present imperfect active indicative] I.
I go house. should be interpreted as:
I go to the/a house.
The verb artice ji is seperated from the verb, because adverbs and
modifiers can be placed between it and the verb. But phoneticaly, it
attaches itself to any word that preceeds it.
So, would you say this language is polysynthetic? If not, what is it then?
Thanks in advance,
Yann Kiraly.