The Celtic winger is looking for more ahead of next season.
The winger was speaking to reporters during a press conference on Wednesday afternoon and reflected on his time so far at Parkhead.
And, according to the 23-year-old, he has not done 'too badly' since joining the Bhoys, meaning he will be pleased if he can keep his current form up.
Armstrong does want to improve, however, and the first areas that came to mind were his goalscoring and his creativity.
The former Dundee United man has netted two goals for Celtic, half the amount Gary Mackay-Steven has since both moved from the same club in January.
SA: "I’ve not done too badly and if I can keep that up and improve I’ll be happy."— Celtic Football Club (@celticfc) May 13, 2015
SA: "I want to add more goals, be creative and improve the sides of my game that need it."— Celtic Football Club (@celticfc) May 13, 2015
SA: "Football is always changing and that's part and parcel of the game."— Celtic Football Club (@celticfc) May 13, 2015
Armstrong has clearly impressed since joining the Bhoys, of course, and it will be a matter of ironing out the odd bad day at the office - such as his performance against Inverness Caledonian Thistle in the Scottish Premiership a few weeks ago - and taking his game to the next level primarily if Celtic want to make their mark in Europe next term.