Again, I posted a screenshot because first of all your posting software allows for it, so I am using this tool to be very clear on the IDE to the board settings. As I said, The drop down menu disappears as soon as one attempts to copy and paste it... so a "print screen" is the only way I can show it clearly for ALL the settings under "Tools".
Secondly, I didn't post the code using tags (I do know how to do this) because again, as I said, I used the simple Blink program, that doesn't work, so I just modified THAT BLINK program to try blinking digital output 5 as I am unsure if a ATtiny88 has an onboard LED for testing. I already said it won't run any program but if you insist on seeing the Blink program with tags fine... here it is... (thie program is not the problem).
// the setup function runs once when you press reset or power the board
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(5, OUTPUT);
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(5, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(5, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
}