Hey, there are  good chances that you may get a good college for B Tech. But I would say that it is preferable to have a good score in JEE as well. As most good colleges consider JEE as a priority. But still 88% is fantastic and would really be sufficient to get into a good college.

The Thapar University Revised Criteria are as follows.

i. Student has passed 10+2 or equivalent examination with at least 70% marks (65% for SC/ST candidates) in aggregate of three subjects, namely, Physics, Mathematics and any one subject out of Chemistry, Biology, Biotechnology and Technical Vocational subject* OR Minimum 70% (65% for SC/ST candidates) marks in a Diploma recognized by AICTE or a state board of technical education of at least 3-year duration.

ii. possesses a good moral character.

iii. is a citizen of India. iv. has passed 10+2 examination in 2018, 2019 or appearing in 2020.

Desirable: The candidate has appeared in JEE (Main)- 2020.